Free Education & Math Widgets

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.