What this time card calculator does
A single day's hours are easy enough to work out by hand. A full week of shifts, each with its own break and maybe an overnight crossover, is where mistakes creep in. This tool takes a full weekly time card — up to seven days, each with a clock-in, clock-out, and unpaid break — and adds it all up into one weekly total, split into regular hours and overtime hours against a threshold you set.
Every field recalculates live, so there is no "calculate" button to press. Skip any day you didn't work by leaving it blank, and the tool ignores it. For a single day's hours rather than a whole week, the hours calculator does the same math for one shift at a time.
How to use it
Five steps — most weeks only need the first two.
- Enter each day's clock-in and clock-out.Type or pick a time for every day you worked. Both 12-hour and 24-hour input work.
- Add each day's unpaid break.Enter minutes for lunch or breaks; leave it at 0 if the day is fully paid.
- Skip days off.Leave the time-in and time-out blank for any day you didn't work — the row is left out of the total.
- Set your overtime threshold.The default is 40 hours a week; change it to match your workplace or local rules.
- Read, copy, print, or download.The weekly total, regular hours, and overtime update instantly and can be saved for your records.
How the weekly total is calculated
Each day is worked out on its own first, the same way as a single shift: convert both times to minutes past midnight, subtract start from end, then subtract the break. If a day's clock-out is earlier than its clock-in, the calculator assumes that shift crossed midnight and adds 24 hours before subtracting the break. Every day's total is then added together, and the weekly sum is split at your overtime threshold.
Tue 09:00–17:00 − 30m = 7h 30m
Wed 09:00–17:30 − 30m = 8h 00m
Thu 09:00–17:00 − 30m = 7h 30m
Fri 09:00–15:00 − 0m = 6h 00m
Sum = 450+450+480+450+360 = 2190 minutes = 36h 30m = 36.50 decimal hours
Threshold 40h not reached → Regular 36.50h, Overtime 0.00h
Overtime
Once the weekly total is known, anything up to the threshold counts as regular hours and anything above it counts as overtime hours. A 44-hour week against a 40-hour threshold, for example, is 40 regular hours plus 4 overtime hours. This is a straightforward weekly-total split — it does not apply state-specific daily-overtime rules some jurisdictions use, so check local requirements if those apply to you.
Decimal hours for payroll
The decimal-hours figure expresses the same total as a fraction of an hour rather than hours and minutes, so 36 hours 30 minutes becomes 36.50. Payroll software multiplies decimal hours by an hourly rate; the standalone time to decimal and decimal to time converters do just that step in isolation.
Quick examples
A few common weekly patterns, checked by hand.
| Week pattern | Days worked | Weekly total | Overtime (>40h) |
|---|---|---|---|
| 5 × 8h days, 30-min lunch each | 5 | 37h 30m | — |
| 5 × 8h days + 4h Saturday | 6 | 44h 00m | 4h 00m |
| 3 part-time days, 6h each | 3 | 18h 00m | — |
| One overnight shift (10 PM–6 AM) + four 8h days | 5 | 40h 00m | — |
Working in 24-hour time and want to sanity-check a clock-in? The military time converter and the 24-hour clock chart map every hour to its 12-hour equivalent.
Who uses it, and for what
- Hourly workers & shift staff checking a full week's clock-ins and clock-outs before submitting a timesheet.
- Managers & small-business owners tallying a team member's week, including overtime, without a spreadsheet.
- Freelancers & contractors turning a week of logged sessions into decimal hours for an invoice.
- Payroll & HR staff double-checking a submitted card before it goes into a payroll system.
If you only need one day's hours rather than a full week, the hours calculator or the plainer time duration calculator are faster. To count working days across a longer stretch, see the business days calculator.
Frequently asked questions
How do I calculate weekly hours from a time card?
Work out each day's hours separately — end time minus start time, minus any break — then add every day together. This tool does that for all seven days at once and shows the weekly total instantly.
Does the time card calculator handle overtime?
Yes. Set the overtime threshold — 40 hours a week by default — and the tool splits the weekly total into regular hours up to that threshold and overtime hours above it.
What happens if a shift crosses midnight?
If a day's clock-out is earlier than its clock-in, the calculator assumes that shift crossed midnight and adds a full day before subtracting the break, the same way the hours calculator handles overnight shifts.
Are unpaid breaks subtracted from each day?
Yes. Minutes entered in a day's break field are removed from that day's worked time before it is added to the weekly total. If a break is longer than the shift, that day counts as zero.
What if I don't work every day of the week?
Leave the time-in and time-out blank for any day off. Blank days are skipped and do not affect the weekly total.
Can I change the overtime threshold?
Yes. The default is 40 hours a week, common in the United States, but you can set any number to match your workplace policy or local labor law. This tool applies a single weekly threshold and does not calculate daily overtime rules some jurisdictions use.
Is the time card calculator free and private?
It is completely free with no sign-up. The calculation runs entirely in your browser — your times are never uploaded or stored on a server.
About the author
Operations and workforce-systems specialist with 14+ years inside shift-based industries and payroll platforms, and a BS in Industrial Engineering. Fletcher writes and reviews the calculators, converters, and guides here — from overnight-shift math to decimal payroll hours — drawing on years spent translating between 12-hour, 24-hour, and military time for real timesheets.
Written & reviewed by Fletcher Langley · Last updated: August 2026