Math & Dates Work hours calculator
Total a week of shifts from start and end times, subtract breaks, handle overnight shifts, and optionally calculate gross pay with overtime.
| Day | Start | End | Break | Worked | Remove |
|---|---|---|---|---|---|
| 7:30 | |||||
| 7:30 | |||||
| 7:30 | |||||
| 7:30 | |||||
| 7:30 |
An end time earlier than the start is treated as an overnight shift, not a negative one.
Total worked
37:30
Decimal hours
37.50
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Reembun. (2026, July 28). Work hours calculator. https://reembun.com/hours-calculator
How to use it
Enter each day
Start and finish times per row, with the break in minutes. Day label keeps a full week readable.
Flag overnight shifts
Overnight shift tells the calculator the finish time falls on the next day, so a 22:00 to 06:00 shift counts as eight hours rather than minus sixteen.
Add a pay rate
Calculate pay turns hours into money, splitting regular from overtime and showing the effective rate across the week.
Copy for the timesheet
Copy decimal hours gives the format payroll and invoices expect, such as 7.75 rather than 7 hours 45 minutes.
What it calculates
For each shift:
minutes worked = (end − start) − unpaid breakwith an end earlier than the start treated as crossing midnight:
minutes worked = (1440 − start + end) − unpaid breakThat second case is the one worth getting right. A 22:00 to 06:00 shift is eight hours; a naive subtraction returns minus sixteen.
A worked example
A standard week, 09:00 to 17:00 with a 30-minute unpaid lunch:
| Day | Start | End | Break | Worked |
|---|---|---|---|---|
| Monday | 09:00 | 17:00 | 30 | 7:30 |
| Tuesday | 09:00 | 17:00 | 30 | 7:30 |
| Wednesday | 09:00 | 17:00 | 30 | 7:30 |
| Thursday | 09:00 | 17:00 | 30 | 7:30 |
| Friday | 09:00 | 17:00 | 30 | 7:30 |
Total: 37:30, or 37.5 decimal hours.
At $25 an hour that is $937.50 gross, under the 40-hour overtime threshold, so no premium applies.
Overtime rules differ more than people expect
There is no single overtime standard, which is why both the threshold and the multiplier are adjustable here.
| Jurisdiction | Common rule |
|---|---|
| US federal (FLSA) | 1.5× after 40 hours per week |
| California | 1.5× after 8 hours/day, 2× after 12 |
| Alberta, Canada | 1.5× after 8 hours/day or 44/week |
| United Kingdom | No statutory premium; contractual |
| Indonesia | 1.5× first hour, 2× subsequent hours |
| Australia | Award and agreement dependent |
Check your contract or award before relying on a calculation. Where a daily threshold applies, weekly totals can understate the premium owed.
Breaks
Whether a break is paid is a legal question with a different answer in different places.
Under US federal rules, short rest breaks of roughly 5 to 20 minutes are generally compensable working time, while bona fide meal periods of 30 minutes or more, during which the employee is fully relieved of duty, generally are not. A meal break where you must stay at your desk to answer the phone is usually working time.
Enter only the unpaid portion. If your break is paid, enter zero.
Rounding
Some employers round clock-in and clock-out times to the nearest quarter hour. Under US rules this is permitted only if it is neutral over time. Rounding consistently against the employee is not lawful.
For your own records, keep exact times and round once at the end rather than at each entry. Rounding every shift accumulates a systematic bias that a week’s worth of entries makes material.
What this does not do
It calculates gross hours and gross pay. It does not model income tax, social contributions, pension deductions, shift premiums, holiday accrual or statutory leave entitlements, all of which vary by country and by contract.
Common questions
How are overnight shifts handled?
An end time earlier than the start is treated as crossing midnight, not as a negative. A shift from 22:00 to 06:00 counts as eight hours, less any break. Tools that subtract naively return minus sixteen hours, which is the single most common bug in timesheet arithmetic.
Should breaks be paid?
It depends on jurisdiction and contract. In the US, federal rules generally treat short breaks under 20 minutes as paid working time and bona fide meal periods of 30 minutes or more as unpaid. Many other countries and most collective agreements differ. Enter only the unpaid portion.
How does overtime work?
The US federal standard is 1.5× after 40 hours in a workweek, but many states use daily thresholds: California pays overtime after 8 hours in a day and double time after 12. Other countries and individual contracts set their own. The threshold and multiplier here are both adjustable because there is no universal rule.
Why decimal hours rather than hours and minutes?
Because payroll systems want decimals. 7 hours 30 minutes is 7.5, not 7.30. This calculator shows both so you can check one against the other before entering anything.
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