Time Card Calculator
Calculate work hours, lunch breaks, overtime and estimated pay with a free time card calculator. No signup required. Overnight shifts are supported.
How to use the Time Card Calculator
- Enter clock-in and clock-out times for each workday.
- Choose a break option and adjust daily break minutes if needed.
- Optionally open Add pay calculation to estimate gross pay.
- Review totals, then copy, print, or export CSV.
How time card hours are calculated
For each day, worked time equals the minutes between clock-in and clock-out, minus unpaid break minutes. Daily totals are summed for the week. Overnight shifts are supported when clock-out is earlier than clock-in.
Daily worked minutes = clock-out − clock-in − unpaid break
Keeping the daily calculation in minutes means a 45-minute lunch is always 45 minutes, not the incorrect decimal value 0.45. Only the finished total is converted to decimal hours.
How lunch breaks are deducted
Fixed breaks subtract a set number of minutes from the shift. Break start/end mode measures the unpaid window between those times. Empty days are ignored and do not create errors.
How weekly overtime is calculated
After daily hours are totaled, minutes above your weekly overtime threshold (default 40 hours) are counted as overtime. If pay is enabled, overtime minutes use your overtime multiplier.
Time card calculation example
Monday 8:00 AM to 5:00 PM with a 60-minute lunch is 8.00 hours worked. A night shift from 10:00 PM to 6:00 AM with no break is also 8.00 hours. Five 8-hour days total 40.00 hours before overtime.
| Day | Clock times | Unpaid break | Worked |
|---|---|---|---|
| Monday | 8:00 AM–5:00 PM | 60 minutes | 8:00 |
| Tuesday | 8:30 AM–5:15 PM | 30 minutes | 8:15 |
| Wednesday | 10:00 PM–6:00 AM | None | 8:00 |
These three shifts total 24 hours 15 minutes, or 24.25 decimal hours. The overnight row is counted as ending the following day.
Decimal hours explanation
Decimal hours convert minutes into a fraction of an hour. 15 minutes is 0.25, 30 minutes is 0.50, and 45 minutes is 0.75. Many payroll systems expect this format instead of hours and minutes.
What to check before using the total
- Confirm every AM/PM selection and mark overnight shifts correctly.
- Deduct only unpaid breaks; paid rest periods remain worked time.
- Check missing punches and unusually long shifts against the original record.
- Verify the overtime threshold, multiplier, and any rounding rule with the policy that applies to you.
- Treat estimated pay as gross arithmetic before taxes, benefits, bonuses, and deductions.
Frequently asked questions
How do I calculate hours on a time card?
Enter clock-in and clock-out for each day you worked, subtract unpaid break minutes, then add the daily totals. This calculator does that automatically and also shows decimal hours.
Does this calculator support overnight shifts?
Yes. If clock-out is earlier than clock-in, the shift is treated as continuing into the next day. For example, 10:00 PM to 6:00 AM is 8 hours before breaks.
How are lunch breaks deducted?
Choose no break, a fixed break duration (such as 30 minutes), or break start and end times. Break minutes are subtracted from the elapsed shift length for that day.
How is weekly overtime calculated?
By default, hours beyond 40 in the week are treated as overtime. You can change the weekly threshold and overtime multiplier in Add pay calculation. Rules vary by employer and jurisdiction.
What are decimal hours?
Decimal hours express time as a fraction of an hour. 8 hours 30 minutes is 8.50 decimal hours. Payroll systems often use this format.
Is estimated pay official payroll?
No. Estimated pay is a simple gross estimate from your hourly rate and overtime settings. It is not tax, benefits, or legal payroll advice.
Does the calculator round time-card punches?
No. The default calculation uses the exact minute values entered. If an employer uses a rounding policy, apply and verify that policy separately rather than assuming it here.
What should I do with a missing clock-in or clock-out?
Leave the row incomplete until you can verify the missing punch. Guessing can make the weekly total and overtime split unreliable.
Can I use the CSV as an official time sheet?
The CSV is a convenient copy of your entered rows and calculated totals. Whether it is accepted as an official record depends on your employer or client.