Overtime Calculator Widget

Embed an overtime pay calculator in a payroll guide or employee handbook. Workers enter their hourly rate and hours and see regular pay, overtime pay and total gross under the US federal 40-hour rule, or switch to daily rules with double time as California applies them.

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<iframe src="https://a2z.tools/embed/w/overtime-calculator" title="Overtime Calculator by A2Z Tools" width="100%" height="600" style="border:0;width:100%" loading="lazy" allow="clipboard-write"></iframe>

A plain iframe. Works everywhere, including site builders that strip scripts. Adjust height if your content needs more room.

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How it works

In weekly mode every hour above the threshold is paid at the multiplier: the federal Fair Labor Standards Act sets 40 hours in a workweek at not less than one and one-half times the regular rate, so 46 hours at 20 gives 40 x 20 plus 6 x 30, or 980. Daily mode follows the California rules published by the state Department of Industrial Relations: hours past 8 in a workday earn 1.5x, hours past 12 earn 2x, and on the seventh consecutive day in a workweek the first 8 hours are at 1.5x and the rest at 2x. Regular hours that push the week past 40 are converted to overtime as well, but an hour is never counted twice. Every threshold and multiplier can be changed, so publishers elsewhere can set their own statutory or contractual limits.

Calculation method

  • Weekly: overtime hours = max(0, hours - threshold); regular = hours - overtime
  • Daily: per day regular = min(h, 8); 1.5x = hours between 8 and 12; 2x = hours over 12
  • Regular hours beyond 40 in the week move to 1.5x; 7th consecutive day: first 8 h at 1.5x, rest at 2x
  • Gross = regular x rate + overtime x rate x multiplier + double time x rate x double multiplier

Worked examples

Federal 40-hour rule

Inputs: Weekly mode; rate 20; 46 hours; threshold 40; multiplier 1.5

Result: Total gross 980.00; regular 800.00; overtime 180.00

6 overtime hours at 30.

A 13-hour day in California

Inputs: Daily mode; rate 20; days 13, 8, 8, 8, 8

Result: Total gross 960.00; regular 800.00; overtime 120.00; double time 40.00

Day one: 8 regular, 4 at 1.5x, 1 at 2x.

Seven 9-hour days

Inputs: Daily mode; rate 20; days 9, 9, 9, 9, 9, 9, 9; seventh-day rule on

Result: Total gross 1,500.00 (40 regular, 22 overtime, 1 double-time hours)

Day six passes 40 regular hours; day seven is 8 at 1.5x and 1 at 2x.

An estimate of gross pay, not legal advice - exemptions, regular-rate adjustments, taxes and local law are not modelled.

Limitations

  • Does not decide whether an employee is exempt, or adjust the regular rate for bonuses and differentials.
  • Daily mode assumes the days entered are consecutive days of one workweek; alternative workweek schedules are not modelled.
  • Gross pay only - tax, withholding and other countries' rules are outside the widget.

Where publishers use it

  • Payroll and bookkeeping blogs explaining how time and a half is calculated
  • Staffing agencies showing shift workers what a 50-hour week pays
  • Restaurant, warehouse and healthcare HR pages with long or split shifts
  • California employment-law explainers demonstrating daily overtime and double time
  • Union and worker-advice sites checking a payslip against hours worked

Questions

When is overtime due under federal US law?

The FLSA requires covered, non-exempt employees to receive at least 1.5x their regular rate for hours over 40 in a workweek. It sets no daily limit, so a 12-hour day inside a 40-hour week owes no federal overtime.

How does California daily overtime differ?

California adds daily thresholds: more than 8 hours in a workday at 1.5x and more than 12 at 2x, plus the seventh-day rule. Four 10-hour days earn 8 hours of daily overtime even though the week is exactly 40.

What does the seventh-day rule do?

If someone works all seven days of a workweek, the first 8 hours on day seven are paid at 1.5x and anything beyond 8 that day at 2x. Seven 9-hour days at 20 an hour total 1,500 in this widget.

Is the regular rate always the hourly wage?

Not always. Under US rules some bonuses and shift differentials must be folded into the regular rate before overtime is calculated. Enter the adjusted regular rate if that applies.

Can I use it outside the US?

Yes - change the weekly threshold, the daily limits and the multipliers to your country's or your contract's figures. The widget does not know any other jurisdiction's law by itself.

Are salaried employees covered?

Exempt salaried employees are not owed FLSA overtime; non-exempt salaried staff are. Whether a role is exempt depends on duties and salary tests that this calculator does not check.

Sources

  1. Overtime Pay - U.S. Department of Labor, Wage and Hour Division . Covered non-exempt employees receive at least one and one-half times the regular rate for hours over 40 in a workweek; no daily limit in the Act. Checked 2026-10-01.
  2. Overtime - Frequently Asked Questions - California Department of Industrial Relations, Labor Commissioner's Office . 1.5x over 8 hours a workday up to 12, 2x over 12, seventh consecutive day rules, and over 40 hours a week. Checked 2026-10-01.

Cite or recommend this tool

If you reference this tool in an article, course or documentation, these formats are ready to copy. They are optional - nothing is added to your site unless you paste it.

A2Z Tools Overtime Calculator
https://a2z.tools/overtime-pay-calculator

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