A2Z Embeds · 379 widgets
Free website widgets, beautifully made
350+ calculators, converters, clocks, badges and interactive tools for any site. Copy one line of code - it works on WordPress, Shopify, Wix, Webflow, Squarespace and plain HTML.
- Try:
- No signup
- No ads inside widgets
- Privacy friendly
- Responsive
- Light & dark
- Copy & paste
See them live
Real widgets, exactly as your visitors see them - not screenshots.
The live example loads when it scrolls into view.
Popular right now
The widgets publishers reach for first.
-
Monthly instalment, total interest and total repayment for any loan.
-
Monthly mortgage payment with property tax, insurance, HOA dues and PMI broken out.
-
Estimated value of a monthly SIP, with an optional yearly step-up.
-
Convert between 54 currencies with live reference rates and the rate shown both ways.
-
Profit, gross margin and markup from cost and price - or the price for a target margin.
-
Sale price and savings, including stacked discounts and sales tax on the reduced price.
-
Add or remove Indian GST at the rate you choose, split into CGST + SGST or IGST.
-
Tip, total and each person's share of a bill, with an option to round shares up.
Browse by category
30 categories, from loans to concrete to SaaS metrics.
- Finance22 widgets
- Real Estate24 widgets
- Business & Ecommerce22 widgets
- Marketing12 widgets
- Developer Tools14 widgets
- SEO & Content12 widgets
- Website & Security15 widgets
- Electrical & Electronics14 widgets
- Education & Math28 widgets
- Time & Date27 widgets
- Travel & Auto21 widgets
- Health & Fitness13 widgets
- Design12 widgets
- QR & Generators6 widgets
- Construction & DIY13 widgets
- Solar & Energy7 widgets
- HVAC & Climate8 widgets
- Logistics & Shipping8 widgets
- Manufacturing & Operations8 widgets
- SaaS & Startups8 widgets
- HR & Work11 widgets
- Creators & Media5 widgets
- Food & Restaurant9 widgets
- Events & Weddings10 widgets
- Pets5 widgets
- Agriculture & Garden6 widgets
- Networking & IT6 widgets
- Business & Contact13 widgets
- Announcements & Notices5 widgets
- Page Components15 widgets
- All calculators232 widgets
New widgets
Recently added to the collection.
-
Build a quick price quote from up to 8 line items with discount and tax, then copy it as text.
-
A slim top-of-page message strip with icon, link button, colour tone and optional start and end dates.
-
Attendance percentage, classes to attend to reach 75%, or how many lectures you can still skip.
-
Australian net pay per week, fortnight or month on 2026-27 ATO rates, with Medicare, HELP and super.
-
Room air conditioner size in BTU/h from floor area, sun, occupants and kitchen use, per ENERGY STAR.
-
A digital business card with call, email, website and directions buttons plus a .vcf contact download.
-
Concrete volume for slabs, footings, round columns or steps, with pre-mix bags and site-mix cement.
-
A dog's age in human years by adult size, plus the 2020 DNA-methylation clock estimate.
Built for your website
Step-by-step instructions for every common platform.
Safe to put on your site
What every widget does - and does not do.
Your visitors' data stays put
Calculators run in the visitor's browser. Nothing typed into a widget is sent anywhere, and widgets set no cookies.
Locked-down frames
Each widget runs in a sandboxed iframe with a strict Content-Security-Policy: no third-party scripts, no trackers, no ads.
No SEO tricks
No hidden links and no keyword anchors are injected into your page. The only credit is a small, plain line inside the widget.
Methods you can check
Every widget page shows its formula, worked examples, limitations and the sources it rests on.
For developers
- Plain iframe, or a 3 KB loader with automatic height
- Theme, accent, currency, units and starting values through URL parameters
- React, Vue, Angular and Next.js examples
- Public JSON registry at
/api/widgets - Strict CSP on every widget frame; no cookies
<div data-a2z-widget="emi-calculator"
data-theme="auto" data-currency="INR"></div>
<script async src="https://a2z.tools/embed.js"></script>
Collections
Hand-picked sets for a type of website.
All widgets
Every widget in the collection, by category.
Finance
-
Monthly instalment, total interest and total repayment for any loan.
-
Payment, total interest and payoff date for any loan, with monthly, biweekly or weekly payments.
-
Monthly mortgage payment with property tax, insurance, HOA dues and PMI broken out.
-
Future value of a lump sum and monthly contributions at any compounding frequency.
-
Estimated value of a monthly SIP, with an optional yearly step-up.
-
Convert between 54 currencies with live reference rates and the rate shown both ways.
-
Simple interest and total amount for a period in years, months or days.
-
Fixed deposit maturity value, or the monthly or quarterly interest payout.
-
Projected retirement savings against what an inflation-linked income needs.
-
Australian net pay per week, fortnight or month on 2026-27 ATO rates, with Medicare, HELP and super.
-
Check an IBAN's length, layout and mod-97 checksum for 89 registry countries, entirely in the browser.
-
Irish PAYE net pay for 2026 after income tax, USC and Class A PRSI, incl. the October PRSI rise.
-
How much to save each month to reach a goal by a date, counting interest.
-
UK salary after income tax, National Insurance, pension and student loans for 2026-27, incl. Scotland.
-
What something will cost in future, and what today's cash will be worth, at a rate you choose.
-
Compound annual growth rate between a starting and an ending value.
-
Return on investment as a percentage, plus the annualised figure when you add the period.
-
How long a card balance takes to clear and what it costs, or the payment to clear it by a date.
-
Avalanche versus snowball for up to five debts: months to debt-free and total interest.
-
Check a BIC/SWIFT code's ISO 9362 structure, country, test-code marker and branch - format only, no lookup.
-
German gross-to-net pay for 2026, tax class I: income tax, Soli, church tax and social insurance.
-
Take-home pay per paycheck after 2026 federal income tax, Social Security, Medicare, 401(k) and HSA.
Real Estate
-
The home price an income supports under the 28/36 debt-to-income rule.
-
Compare net worth after renting or buying over the years you plan to stay.
-
Gross and net rental yield after vacancy and running costs.
-
Capitalization rate from income and price, or the value at a target cap rate.
-
Down payment, loan amount, LTV and total cash needed to buy a home.
-
Maximum home-loan EMI and loan amount from net income using the FOIR method.
-
Total floor area of up to six rectangles, circles and triangles in sq ft and square metres.
-
Convert land and floor area between sq ft, sq m, gaj, acres, hectares, cents, guntha and more.
-
Paint needed for a room after doors and windows, rounded up to real can sizes.
-
How much sooner a home loan ends, and how much interest disappears, with extra or lump-sum payments.
-
A for-sale or to-let home card: price, status, rooms, floor area in sq ft and m² and agent buttons.
-
SDLT on a home in England or Northern Ireland: first-time buyer, additional and non-resident rates.
-
Scottish LBTT on a home purchase with first-time buyer relief and the 8% Additional Dwelling Supplement.
-
New payment, monthly saving, break-even month and lifetime interest when a mortgage is refinanced.
-
Welsh LTT on a residential purchase at the main rates or the separate higher residential rates.
-
Monthly and yearly cash flow, NOI and DSCR for a rental after expenses and the mortgage payment.
-
NSW, VIC or QLD transfer duty for home buyers, first home buyers and investors, plus foreign surcharges.
-
Year-one cash-on-cash return on the money actually put into a property, with an optional cost breakdown.
-
Council tax bands, values and ratios to Band D for England, Scotland and Wales, priced from your council.
-
Project a home's future value at a growth rate, or find the yearly rate between two sale prices.
-
Fix-and-flip profit, ROI and annualised ROI with hard-money financing, plus the 70% rule offer.
-
Rent you can afford at 30% of gross income, a 25-35% range and what is left after rent and debts.
-
Price per square foot or square metre for up to three listings side by side, or a price from a rate.
-
Interest-only cost of a construction loan drawn in stages, then the payment after it converts.
Business & Ecommerce
-
Profit, gross margin and markup from cost and price - or the price for a target margin.
-
Selling price from cost plus markup, or work back to the cost or the markup you applied.
-
Sale price and savings, including stacked discounts and sales tax on the reduced price.
-
Units and revenue needed to cover fixed costs, plus the sales needed for a profit target.
-
Add or remove Indian GST at the rate you choose, split into CGST + SGST or IGST.
-
Add VAT to a net price or extract it from a gross price, at a UK rate or any rate you type.
-
US-style sales tax from the state and local rates you enter, or the tax hidden in a tax-inclusive total.
-
Tip, total and each person's share of a bill, with an option to round shares up.
-
Build a quick price quote from up to 8 line items with discount and tax, then copy it as text.
-
What you receive after a percentage-plus-fixed processing fee, or what to charge to receive a set amount.
-
Minimum hourly and day rate from the income you want, your costs, tax and billable hours.
-
Standard and reduced VAT rates of all 27 EU Member States, dated and sourced, with a net/gross calculator.
-
Pick a state and get its official statewide sales tax rate, the tax on a price and the total - or reverse it.
-
Check an EU or Northern Ireland (XI) VAT number against the official VIES structure, then verify it on VIES.
-
Add or remove Australian 10% GST, or total an invoice's taxable and GST-free lines with the ATO checklist.
-
Check a UK postcode's format, fix its spacing and case, and see its area, district, sector and unit.
-
Profit, margin, effective hourly rate and budget burn for a fixed-fee or hourly client project.
-
Billable utilization against available hours, the gap to target and the revenue it represents.
-
Three-point PERT estimates for up to six tasks: expected time, standard deviation and 68% and 95% ranges.
-
Profit per order after cost, shipping, payment and marketplace fees, ads and returns - plus break-even ROAS.
-
Average order value, orders needed for a revenue goal, and the payoff of a higher basket size.
-
How many more units a discount must sell to keep the same gross profit, with a 5-25% comparison table.
Marketing
-
Return on ad spend as a multiple and a percentage, with break-even ROAS from your margin.
-
Solve CPM, campaign cost or impressions from the other two.
-
Cost per click plus CTR, CPM, conversion rate and CPA from one campaign's totals.
-
Conversion rate from visitors and conversions, with an optional A/B comparison and z-test.
-
Social media engagement rate by followers and by reach, for one post or several.
-
Tag a URL with UTM campaign parameters, keeping its query and #fragment, then copy it.
-
A sign-up box with benefits, send day and privacy line that opens your own newsletter subscribe page.
-
Ask every visitor for a review with up to three equal public review links and an optional QR code.
-
Promote your mobile app with icon, features and neutral App Store and Google Play buttons plus a QR.
-
Marketing efficiency ratio from total revenue and spend, new-customer aMER and a spend ceiling.
-
Fundraising goal thermometer: amount raised, goal, percentage and days left, set in the builder.
-
An animated band of up to four headline numbers that count up once when they scroll into view.
Developer Tools
-
Pretty-print, minify or validate JSON, with the line and column of the first syntax error.
-
Convert a JSON array of objects to CSV and CSV back to JSON, with RFC 4180 quoting.
-
Encode text to Base64 or decode it, with proper UTF-8 and an optional URL-safe alphabet.
-
Percent-encode or decode text and URLs, and find the exact position of a malformed escape.
-
Read a JSON Web Token's header and claims, with exp, nbf and iat shown as dates.
-
Generate 1 to 100 random v4 or time-ordered v7 UUIDs in several formats.
-
Live epoch time, timestamp to date (seconds to nanoseconds detected) and date to timestamp.
-
Test a JavaScript regular expression: highlighted matches, capture groups and a replace preview.
-
Turn a cron schedule into plain English and list its next five run times.
-
MD5, SHA-1, SHA-256, SHA-384 and SHA-512 of any text, in hex or Base64.
-
Live Markdown preview with tables and task lists, plus safe HTML to copy.
-
Network, broadcast, host range, masks and host count for any IPv4 CIDR, with subnet splitting.
-
Cost per request, day and month for any LLM API from tokens or words and your own prices.
-
Estimated GPU memory to run a language model: weights by precision plus KV cache and overhead.
SEO & Content
-
Words, characters, sentences, paragraphs, reading time and social-media character limits.
-
Preview a title, URL and meta description as a Google-style result, with pixel-width estimates.
-
Preview Facebook, LinkedIn and X link cards and generate the Open Graph meta tags.
-
Turn a title into a clean URL slug: accents transliterated, optional stop-word removal and length cap.
-
Top one-, two- and three-word phrases in a text with counts and density, plus a focus keyword.
-
Check whether a robots.txt allows a crawler to fetch a URL, and which rule decides it (RFC 9309).
-
Reading and speaking time for a word count or pasted text, at research-based reading speeds.
-
Flesch, Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau and ARI scores for English text.
-
Title Case, Sentence case, UPPER, lower, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE.
-
Placeholder text by paragraphs, sentences or words, as plain text or HTML paragraphs.
-
Compare two versions of a text line by line or word by word, with additions and removals marked.
-
Enter a URL to see its HTTP status code and every redirect hop.
Website & Security
-
A live badge showing that your SSL certificate is valid, trusted and how many days it has left.
-
A badge counting down the days until your SSL certificate expires.
-
Shows whether your site serves HTTPS and redirects plain-HTTP visitors to it.
-
Shows whether your site sends HTTP Strict Transport Security, with max-age and preload.
-
Counts how many of six key HTTP security headers your site sends - e.g. "5 / 6".
-
Shows whether your domain publishes an SPF record and how it ends (-all, ~all).
-
Shows your domain's DMARC policy - p=reject, p=quarantine or p=none.
-
Shows whether your domain is DNSSEC-signed and validates.
-
A live online/offline badge for any website, re-checked every five minutes.
-
Estimates password strength from length and common patterns - checked entirely in the browser.
-
Let visitors check any domain's SSL certificate: validity, expiry, issuer and trust.
-
Shows the visitor's browser, OS, screen, language, time zone and other settings - read locally.
-
Visitors enter a domain and see which of six key security headers it sends.
-
Checks a domain's SPF and DMARC records and DNSSEC status in one go.
-
Shows the visitor's public IPv4 or IPv6 address as A2Z sees it, with a copy button.
Electrical & Electronics
-
Enter any two of voltage, current, resistance and power to get the other two.
-
Watts, volt-amps and amps for DC and single-phase AC circuits, with power factor.
-
kW, kVA and kVAR from line voltage, current and power factor - or the current from kW or kVA.
-
Volts and percent lost along a copper or aluminium cable, for DC, single-phase and three-phase runs.
-
Convert AWG to mm2, diameter in mm and inches, circular mils and copper resistance.
-
Output voltage of a two-resistor divider, or the R2 needed for a target voltage, with an optional load.
-
Series resistor for one LED or a string: standard E12/E24 value, real current and power rating.
-
Read 4, 5 and 6-band resistor colour codes, or find the bands for a value.
-
Equivalent of up to 8 resistors or capacitors in series or in parallel.
-
kVA, kVAR and phase angle from kW and power factor, plus the capacitor kVAR to reach a target.
-
How long a battery runs a load, from Ah, voltage, depth of discharge and efficiency.
-
Backup time of a home inverter or UPS battery bank, or the battery Ah needed for the hours you want.
-
Panels and system kW needed to cover your energy use, from your own peak sun hours.
-
Daily, monthly and yearly running cost of up to 8 appliances at your tariff.
Education & Math
-
X% of Y, X as a percent of Y, and the percentage change between two values.
-
A clean on-screen calculator with keyboard support, correct operator precedence and percent.
-
Trig in degrees or radians, logs, roots, powers, factorials, pi, e and Ans - typed or tapped.
-
Add, subtract, multiply and divide fractions and mixed numbers, with the simplified answer.
-
Mean, median, mode, range, variance, standard deviation and quartiles of any list of numbers.
-
Credit-weighted GPA for a term, plus the new cumulative GPA when you add prior results.
-
The score you need on the final exam to reach a target grade, plus best and worst cases.
-
Real or complex roots of ax^2 + bx + c = 0, with the discriminant, vertex and axis of symmetry.
-
Numbers 1-3999 to Roman numerals and back, with strict checking and a symbol-by-symbol breakdown.
-
Attendance percentage, classes to attend to reach 75%, or how many lectures you can still skip.
-
Binary, octal, decimal, hex and any base from 2 to 36 - exact for very large integers.
-
Length, mass, volume, area, temperature, speed, time, data, pressure, energy and power - exact factors.
-
Celsius, Fahrenheit, Kelvin and Rankine in one step, with the formulas shown.
-
Course grade from up to 8 weighted parts - homework, quizzes, midterm, final - with an optional letter.
-
SGPA for each semester and credit-weighted CGPA across all of them, on a 10-point or 4-point scale.
-
CGPA to percentage with only official formulas: CBSE 9.5 x CGPA, VTU (CGPA - 0.75) x 10, or your own.
-
A 25/5 focus timer with long breaks, cycle counter and pause, skip and reset - every length editable.
-
Fairly pick a student, winner or volunteer from a list, with history and an option to remove each pick.
-
Split a class list into a chosen number of groups, or groups of a set size, balanced and shuffled fairly.
-
Times table for any number up to x30, with a quick-fire practice quiz and a print button.
-
Greatest common divisor (HCF) and least common multiple of 2 to 10 numbers, with Euclid's steps.
-
Prime test and prime factors with exponents for numbers up to one trillion, plus divisor count and sum.
-
Simplify a : b (decimals too), scale a ratio to a target amount, or solve a : b = c : x.
-
Numbers and amounts in words, in both million/billion and lakh/crore systems, with rupee or dollar wording.
-
Quotient, remainder and repeating decimal, with each divide-multiply-subtract-bring-down step laid out.
-
Count significant figures digit by digit and round any value to N sig figs, scientific notation included.
-
Solve a triangle from SSS, SAS, ASA, AAS or two sides of a right triangle: sides, angles, area, type.
-
Volume and surface area of nine solids, from cube to capsule, in cubic units, litres and gallons.
Time & Date
-
Live days, hours, minutes and seconds to a date you set, with an "event has started" message.
-
Exact age in years, months and days, totals in months, weeks and days, and the next birthday.
-
Convert a date and time between any two time zones, with daylight-saving gaps and overlaps explained.
-
A large live digital clock for any time zone, with seconds, date and a 12/24-hour switch.
-
Live local time, date and UTC offset for up to 12 cities you choose.
-
Years, months and days between two dates or date-times, plus totals in days, weeks and hours.
-
Count working days between dates or add N business days, with your weekend and holidays.
-
A classic clock face with hour, minute and second hands for your zone or any city.
-
A keyboard-friendly month calendar with today highlighted and your own marked dates.
-
Shows Open now or Closed and when you open next, in your business's own time zone.
-
An hour-by-hour grid for up to four time zones that highlights where working days overlap.
-
All 11 US federal holidays for any year, with the Friday or Monday day off when one hits a weekend.
-
A slim banner with your offer headline, a live countdown and an optional Shop now button.
-
Sunrise, sunset, solar noon, day length and twilight for any place and date.
-
Today's Moon phase drawn to scale, with illumination, age and the next full and new moon.
-
Fajr, Sunrise, Dhuhr, Asr, Maghrib and Isha for any place, with the major calculation methods.
-
Live clocks for Eastern, Central, Mountain, Arizona, Pacific, Alaska and Hawaii with EST/EDT-style labels.
-
ISO 8601 week number, the week's Monday-Sunday dates, day of the year and the US week count.
-
Hours and minutes between two times, a time plus or minus a duration, or a list of h:mm added up.
-
Next and upcoming UK bank holidays for England and Wales, Scotland or Northern Ireland, from GOV.UK.
-
Public holidays for any Australian state or territory and year, from each Act's rules, with .ics download.
-
Gregorian to Hijri and back on the Umm al-Qura calendar, with today's Hijri date and month length.
-
Working days between two dates, or N working days on, skipping weekends and official UK bank holidays.
-
Live countdown to the next Ramadan, then day N of Ramadan and the countdown to Eid al-Fitr.
-
Great-circle bearing to the Kaaba from true north, with a compass rose and the distance to Mecca.
-
Business days between two dates, or N business days ahead, skipping weekends and observed US federal holidays.
-
Morning and evening golden hour and blue hour for any place and date, from the sun's elevation.
Travel & Auto
-
Fuel needed and trip cost from distance, economy and fuel price, split between passengers.
-
Convert between MPG (US), MPG (UK), L/100 km and km per litre with exact factors.
-
Monthly car payment with down payment, trade-in, sales tax and fees, plus the total cost.
-
Cost and energy to charge an electric car between two battery levels, with charging losses.
-
Diameter, sidewall and revolutions of a tyre size, and the speedometer error of a new size.
-
Solve speed, distance or time from the other two, in km, miles, metres or nautical miles.
-
Trip total, per person and per day from stay, food, transport, activities, flights and a buffer.
-
A car's estimated value year by year, by declining balance or straight line.
-
Live forecast card for one place: temperature, wind arrow and compass, humidity and the next 12 hours.
-
Today, tomorrow and the day after for one place: daily high, low, rain total and a midday icon.
-
A used-car stock card: price, miles and km, fuel, gearbox, owners, finance note and dealer buttons.
-
Miles times the IRS standard rate for business, medical or charity driving, with a dated trip log.
-
How long an electric car takes to charge between two levels on a given AC or DC charger.
-
Yearly fuel versus electricity cost of a petrol car and an EV, the saving and years to repay the price gap.
-
Total cost of leasing a car against financing and reselling it over the same number of months.
-
Overall ratio, output rpm and output torque for one to three meshing gear pairs from tooth counts.
-
Road speed from engine rpm, gear, final drive and tyre size - or the rpm needed for a given speed.
-
kW per tonne, hp per ton and lb or kg per horsepower for one vehicle, or two compared.
-
Latitude and longitude between decimal degrees, degrees-minutes-seconds and decimal minutes.
-
Great-circle distance, initial bearing and midpoint between two latitude and longitude points.
-
Searchable international dialling codes for every country and territory, with how to dial each one.
Health & Fitness
-
Body mass index with the WHO adult category and the healthy weight range for a height.
-
Basal metabolic rate from Mifflin-St Jeor or the revised Harris-Benedict equation.
-
Maintenance calories (TDEE) and daily targets for gradual weight loss or gain.
-
Body fat percentage from tape measurements with the US Navy method, plus ACE category.
-
Devine, Robinson, Miller and Hamwi ideal weights side by side, with the healthy BMI range.
-
An estimated daily fluid range from body weight and exercise time, from published guidance.
-
Daily grams of protein, carbohydrate and fat from calories and a macro split.
-
Estimated due date, weeks pregnant, trimester and key dates from LMP, conception or IVF.
-
Estimated ovulation day and fertile window for the next three cycles.
-
Estimated max heart rate and five training zones, with optional Karvonen zones.
-
Pace per km and per mile from distance and time, or finish time from a target pace.
-
Estimated 1RM from a set of 1-12 reps by Epley and Brzycki, with a training-load table.
-
A weekly gym or studio timetable with day tabs, class and level filters, Now and Next markers.
Design
-
WCAG 2.x contrast ratio of two colours, AA/AAA results and the nearest passing shade.
-
Convert any colour between HEX, RGB, HSL, HSV and CMYK, with a swatch and copy buttons.
-
Build a linear or radial CSS gradient with 2-5 colour stops and copy the code.
-
Complementary, analogous, triadic, split, tetradic and monochrome palettes from one colour.
-
Simplify width x height to a ratio and resize to a new width or height without distortion.
-
Convert pixels to rem (and back) for any root font size, with a table of common sizes.
-
Pixels to print size at any DPI and back, plus the largest sharp print at 300, 240 and 150 DPI.
-
Pixel density and dot pitch of any screen from its resolution and diagonal, with labelled presets.
-
Width, height and area of a screen from its diagonal and aspect ratio, and two screens compared.
-
Split any length by the golden ratio, find the missing side, and list golden sizes and type steps.
-
A modular type scale in px and rem from a base size and ratio, with a live preview and CSS variables.
-
How up to six colours look with protanopia, deuteranopia, tritanopia and achromatopsia, with clashes flagged.
QR & Generators
-
Turn any link or text into a QR code, pick colours and error correction, download PNG or SVG.
-
Strong random passwords from 8 to 128 characters, with the entropy of each shown in bits.
-
A QR code guests scan to join your Wi-Fi without typing the password.
-
A UPI payment QR code for any UPI ID, with an optional fixed amount and note.
-
Put name, phone, email, website and address in a QR code that saves as a phone contact.
-
Fair random numbers in any range - whole or decimal, with or without repeats, sorted if you like.
Construction & DIY
-
Concrete volume for slabs, footings, round columns or steps, with pre-mix bags and site-mix cement.
-
Bricks or blocks for a wall from its size and openings, with US, UK, Indian and CMU unit presets.
-
Tiles and boxes for a floor or wall from its size, the tile size, grout joint and cut waste.
-
Boxes of laminate, vinyl or wood flooring by box coverage, with a waste allowance for the laying pattern.
-
Roof area, squares, shingle bundles and underlayment rolls from the footprint, overhang and pitch.
-
Convert roof pitch between X/12, degrees, percent grade and pitch factor, with rafter length.
-
Risers, treads, total run, stringer length and angle for a straight stair, checked against IRC or UK limits.
-
Decking boards, joists and screws for a rectangular deck from its size, board width, gap and joist spacing.
-
Fence posts, rails, pickets and post-hole concrete bags for a run of fence with gates.
-
Cubic yards or metres, tons or tonnes and bags of gravel, crushed stone or sand for an area and depth.
-
Cubic yards or litres and bags of mulch, topsoil or compost for a bed, with extension depth advice.
-
Drywall sheets, screws, joint compound and tape for a room's walls and ceiling.
-
Board feet, cubic metres and cost for up to three lumber line items.
Solar & Energy
-
Payback year, lifetime net savings and ROI of a solar system, with tariff rises and panel degradation.
-
Daily, monthly and annual kWh and specific yield of a solar array from kWp, sun hours and performance ratio.
-
Battery bank kWh and Ah for days of autonomy, depth of discharge and system voltage, with battery count.
-
Inverter VA rating from a list of appliances, their surge factors, power factor and headroom.
-
Generator kW and kVA from running watts and the largest motor's starting surge.
-
Fuel per hour, runtime per tank and running cost of a diesel, petrol, LPG or gas generator.
-
Best fixed tilt and facing direction for solar panels at any latitude, with seasonal angles.
HVAC & Climate
-
Room air conditioner size in BTU/h from floor area, sun, occupants and kitchen use, per ENERGY STAR.
-
Simplified design heat loss in kW and BTU/h from size, insulation, windows, air leakage and temperatures.
-
Convert cooling and heating capacity between BTU/h, tons of refrigeration, kW, kcal/h and horsepower.
-
Room airflow in CFM, m³/h or L/s converted to air changes per hour, and back again.
-
Round duct diameter and an equal-friction rectangular duct from airflow and design velocity.
-
Dew point from air temperature and relative humidity, or humidity from a dew point, in °C or °F.
-
The NWS 'feels like' heat index from temperature and humidity, with the official risk category.
-
Wind chill temperature from air temperature and wind speed, with frostbite risk times.
Logistics & Shipping
-
Dimensional and chargeable weight of a parcel with UPS, FedEx, USPS, DHL Express, IATA or custom divisors.
-
Carton shipment volume in m³ and ft³, gross weight, and how full a 20' or 40' container would be.
-
How many identical boxes fit in a 20', 40' or 40' high cube container, by space and payload.
-
Boxes per layer and per pallet for EUR, ISO, GMA or custom pallets within height and weight limits.
-
LTL freight density in lb/ft³ and kg/m³, with the 2025 NMFC density-based class for density-rated items.
-
Trucking fuel surcharge per mile or km from fuel price above a base, or as a percentage of linehaul.
-
Total and per-unit landed cost of an import: goods, freight, insurance, duty, import VAT/GST and fees.
-
Inventory turns and days inventory outstanding from COGS, with the stock level needed for a target.
Manufacturing & Operations
-
Availability, Performance, Quality and overall equipment effectiveness from shift data.
-
The production pace customer demand requires, plus the operators a line needs to hold it.
-
Measured seconds per unit and hourly throughput, checked against a target takt if you have one.
-
First pass yield per step, rolled throughput yield, scrap rate and optional DPMO for up to six steps.
-
The stock level that should trigger a purchase order, and how many days remain before you hit it.
-
Statistical buffer stock from a service level, demand variability and optional lead-time variability.
-
Economic order quantity, orders per year and the lowest ordering-plus-holding cost, with a cost curve.
-
MTBF, MTTR, failure rate, inherent availability and mission reliability from a failure log.
SaaS & Startups
-
Monthly and annual recurring revenue plus ARPA from up to three plans, annual contracts and discounts.
-
Customer churn and retention for a month, quarter or year, converted between periods by compounding.
-
NRR and GRR for a customer cohort from starting MRR, expansion, contraction and churned revenue.
-
Subscription LTV from ARPA, gross margin and monthly churn, with LTV:CAC against the 3:1 benchmark.
-
Customer acquisition cost from sales and marketing spend, with CAC payback months from ARPA and margin.
-
Gross and net burn, months of runway and the date cash runs out, with optional revenue growth.
-
Adds revenue growth and profit margin to test a SaaS company against the 40% bar.
-
Founder ownership after a priced round, including the option pool shuffle and effective pre-money.
HR & Work
-
Hourly wage to annual, monthly, biweekly, weekly and daily pay - or a salary back to an hourly rate.
-
Employer super at 12% per payday and the Payday Super deadline 7 business days later, holidays skipped.
-
Weekly overtime at 1.5x past 40 hours, or California-style daily overtime and double time - all editable.
-
Check pay against the UK National Minimum Wage or Living Wage for a worker's age band and apprentice status.
-
Fully loaded employee cost: salary plus contributions, benefits and overhead, per year and per hour.
-
Turnover rate from leavers and headcount, annualised from a month or quarter, with retention.
-
Seven-day timesheet with start, end and unpaid breaks, night shifts, overtime and gross pay.
-
Last working day from the date notice is given and a notice length in days, weeks or months.
-
PTO accrued per pay period and the balance projected to a date, with leave taken and a carryover cap.
-
What a meeting costs in people-time - per minute, per meeting and per year - plus a live running cost meter.
-
New pay after a raise, the difference per year, month and paycheck, and the real raise after inflation.
Creators & Media
-
A low-to-high range of channel income per day, month and year from views and your own rates.
-
A price range for a sponsored post or package from expected views, a rate per 1,000 and usage rights.
-
Monthly sponsorship, paid-subscription and total income for an email newsletter, after platform fees.
-
Solve file size, duration or total bitrate from the other two, with YouTube's upload bitrate table.
-
Viewer egress in Mbps or Gbps, data per hour and per event, and the upload speed a streamer needs.
Food & Restaurant
-
A printed-style restaurant menu with sections, price variants, dietary badges with a legend and an allergen note.
-
Period food cost percentage from opening stock, purchases, closing stock and food sales, against a target.
-
Ingredient-by-ingredient batch cost, cost per serving and a suggested price, allowing for trim and waste.
-
A menu price for one dish from its plate cost, by target food-cost % or markup, rounded to a tidy ending.
-
Paste an ingredient list and rescale it by servings or a factor, with kitchen fractions for cups and spoons.
-
Dough weights from flour and baker's percentages, percentages from weights, or flour for N dough balls.
-
Compare up to three round or rectangular pizzas by area and price per square inch to find the best deal.
-
Coffee dose or water for pour-over, drip, French press, AeroPress, cold brew or espresso by brew ratio.
-
Cups, spoons, ml, grams and ounces - including cups of flour or sugar to grams from a cited weight chart.
Events & Weddings
-
An event-page card with a live countdown, local-time conversion and Google, Outlook and .ics buttons.
-
One button that opens a menu to save an event in Google Calendar, Outlook.com, Microsoft 365 or Apple Calendar.
-
A conference or festival programme with day tabs, a live Now and Up next marker and local-time toggle.
-
Forecast for the hours of one outdoor event, or the date the forecast will become available.
-
League standings that compute goal difference and points, apply tie-breakers and mark zones.
-
Upcoming fixtures and recent results grouped by date, with a team filter and calendar links.
-
Split a wedding budget across venue, catering, photography and more, with cost per guest and editable shares.
-
Per-head and fixed event costs plus a contingency, giving the total, the cost per guest and a breakdown.
-
Room capacity for standing, theatre, classroom or banquet layouts, checked against code factors.
-
Ticket price for a profit target with fees absorbed or passed on, break-even sales and profit at any price.
Pets
-
A dog's age in human years by adult size, plus the 2020 DNA-methylation clock estimate.
-
A cat's age in human years on the International Cat Care chart, with its life stage.
-
Daily calories for a dog from RER and life stage, turned into cups or grams of its food.
-
A cat's daily calories split between dry kibble and wet cans, with a treat allowance.
-
Estimated whelping date and window from mating, ovulation, LH surge or diestrus dates.
Agriculture & Garden
-
Seed rate in kg/ha or lb/acre from target plants, thousand-seed weight and expected losses.
-
Plants per bed, per m2 and per hectare for square, triangular or row spacing - or the reverse.
-
How much N-P-K product meets a nutrient rate, plus the other nutrients and bags it brings.
-
Weekly irrigation water and run time from reference ET, a FAO-56 crop coefficient and rainfall.
-
Pre-harvest corn yield from ear counts and kernels, or any crop's production and revenue.
-
Dry-matter and as-fed feed per head, herd totals for a period and the daily feed cost.
Networking & IT
-
Turn any IPv4 start-end range into the minimal list of CIDR blocks that covers exactly it.
-
How long a file takes at a given connection speed - or the speed a deadline needs.
-
Bits, bytes, kB to PB and KiB to PiB in one table - and why a 1 TB drive shows 931 GiB.
-
Convert Mbps, Gbps and kbps to MB/s, MiB/s and back, with every rate unit side by side.
-
Allowed downtime per day, week, month, quarter and year for any availability %, and the reverse.
-
Usable capacity, efficiency and failures survived for RAID 0, 1, 5, 6, 10, 50 and 60 arrays.
Business & Contact
-
A digital business card with call, email, website and directions buttons plus a .vcf contact download.
-
A giving card with suggested amounts, an optional monthly switch and a Donate link to your own page.
-
Staff profiles with photo or initials, role, short bio and an email or LinkedIn button, grouped by department.
-
Large Call, Text, Email, WhatsApp and custom-link tap targets in a stack, row or pill bar.
-
Branch list by region with directions, call buttons and a town or postcode filter - no map API key.
-
Visitors pick a service, date and time, then WhatsApp, email or SMS opens with the request already written.
-
Up to 12 social profile links recognised by host name, as icons, labels or buttons.
-
A careers list grouped by department with location, type and salary, New badges and filter chips.
-
A mobile-first profile with avatar, bio, featured link buttons and social badges in soft, bold or outline style.
-
Check-in and check-out times, grouped amenities with drawn icons, unavailable items and house rules.
-
A 'Trusted by' grid of client logos with text fallbacks, grayscale-to-colour and an optional pausable row.
-
A service price list with categories, durations and a booking button for salons, clinics and trades.
-
A chalkboard-style daily specials board that can show only today's offers in your business's time zone.
Announcements & Notices
-
A slim top-of-page message strip with icon, link button, colour tone and optional start and end dates.
-
Holiday opening hours and closure dates that hide past days and highlight today in your time zone.
-
Maintenance, degraded-service and outage notices with the time window converted to each visitor's zone.
-
A free-delivery threshold message with a progress meter showing how much more a basket needs.
-
Days, hours and minutes to the next Christmas, Easter, Thanksgiving, Black Friday or 13 other holidays.
Page Components
-
Accessible FAQ accordion with search, expand-all, numbering and a copy-as-text button.
-
Photo grid, masonry columns or a sideways strip with a keyboard-friendly lightbox and alt-text checks.
-
A vertical or sideways-scrolling timeline of dated milestones, with an optional Now marker.
-
Drag-to-compare before and after photos with a keyboard slider, vertical mode and a side-by-side fallback.
-
Numbered How-it-works steps with drawn icons, or an order tracker that highlights the current step.
-
Customer quotes as cards, a featured quote, a list or a manual slider, with stars and initials avatars.
-
What's-new release notes with versions, ISO dates, New/Fixed/Security pills and a Show older button.
-
A tick-off checklist with sections, progress, copy and print - saved only on the visitor's device.
-
Two to five plan cards with a monthly/yearly switch, saving %, highlighted plan and comparison mode.
-
Feature-by-feature comparison of 2-6 products with ticks, crosses and words, a sticky first column and grouping.
-
Planned, In progress and Done columns with item counts, tags and a "plans can change" footnote.
-
Your own claims - family owned, free estimates, licensed - as clean badges, each marked self-declared.
-
Launch, maintenance or back-soon card with a countdown, your own notify link and a live state after the date.
-
Your average rating, review count and star breakdown bars, with a link to where the reviews live.
-
Up to 12 key figures in a strip, grid or cards, with numbered footnotes and a self-reported note.
Questions
More in the embed documentation.
Are the widgets really free?
Yes. There is no plan, no account and no API key. Widgets carry no ads; the only branding is a small "Powered by A2Z Tools" line inside the widget.
Will a widget slow my page down?
Each widget loads lazily inside its own frame, uses the system font and no framework, and the optional loader is about 3 KB. Your page's own scripts never wait for it.
Can I match my site's colours?
Choose light, dark or automatic theme and set an accent colour on any widget page. Text on the accent switches between dark and white automatically so it stays readable.
Does it work inside a narrow sidebar?
Widgets are designed down to about 300 pixels wide and grow with their container; the loader keeps the height right as results change.
How attribution works
Every widget shows a small, plain "Powered by A2Z Tools" link inside its own frame. Your page gets no hidden links, no keyword anchors and no injected scripts. If a widget helps your readers, a normal link to A2Z Tools is always appreciated - and never required.