Enter hours in 24-hour HH:MM format. Lunch is unpaid minutes per day.
Calculation details
Planning estimate only. Pay, overtime, holidays, and working-time rules vary by employer and jurisdiction.
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Use this result
Share the current inputs or ask ChatGPT to explain the calculation in context.
What does this calculator estimate?
A time card calculator totals work hours from clock-in/out times. Enter the start and end times, lunch break, and days worked to see daily and total hours.
- Daily hours = end − start − lunch
- Total = daily × days
- Flags hours above the overtime threshold
How time cards work
A time card records when you clock in and out, with lunch subtracted, to total paid hours. The calculator applies the same logic: end minus start minus break equals daily hours, multiplied across days, with overtime identified.
Limitations to watch for
The tool assumes a consistent schedule across days — use the average or calculate per-day for irregular weeks. Overtime rules vary (daily vs weekly thresholds, state laws). Lunch is subtracted only once per day.
How to use it in practice
Enter your typical start/end and lunch length, then the days worked. Check the overtime flag against your workplace's rules. Use the total to verify paystubs or plan your week.
['Enter the start and end times.', 'Enter the lunch break in minutes and days worked.', 'Read daily hours, total, and overtime.']
What a time card calculator does
The tool totals hours worked from clock-in/out pairs, subtracts breaks, and applies overtime rules. It produces the weekly total that feeds payroll.
Break and rounding rules
Unpaid breaks subtract from paid time; payroll systems often round to 6- or 15-minute increments. The calculator handles both exact and rounded totals so the number matches the pay stub.
Overtime thresholds
Hours over 40 in a week earn time and a half under federal rules; daily thresholds apply in some states. The calculator splits regular and overtime hours.
A worked example
Mon–Fri: 8:30–5:00 with a 30-minute lunch = 8 hours daily, 40 regular hours. Saturday: 4 hours = 4 overtime. Weekly total 44 hours: 40 regular + 4 OT. The calculator returns both.
Accuracy pays
Time-card errors favor the employer on rounding and break policy; a worker tracking their own totals catches discrepancies. The calculator's transparent arithmetic keeps the record honest.
How this calculator works
Formula
Daily hours = (end time − start time − lunch) in hours. Total = daily hours × days worked. Overtime: hours above the daily/weekly threshold paid at the overtime rate.
Worked example
Working 9:00–17:30 with a 30-minute lunch = 8.0 hours per day.
Assumptions to verify
- The schedule is the same each day.
- One unpaid lunch break per day.
- Overtime threshold is the entered value.
Frequently asked questions
How do I calculate hours worked?
End time minus start time minus lunch: 9:00–17:30 with 30 min lunch = 8.0 hours.
How do I handle different schedules?
Calculate each day separately or enter the average — the tool assumes a consistent daily schedule.
What counts as overtime?
It depends on your jurisdiction — often hours over 40/week or 8/day. The tool flags hours above your entered threshold.
Is lunch paid or unpaid?
The tool subtracts it as unpaid — which is standard for hourly workers in most places.
How do I convert minutes to decimals?
Divide by 60: 30 min = 0.5 hours. The tool handles the conversion.
How do I verify my paystub?
Total your hours with the tool and multiply by your rate — then compare to the gross on your stub.
What about overtime pay?
Enter the overtime hours at 1.5× your rate (or your company's policy) separately.
How do I calculate hours on a time card?
Sum clock-out minus clock-in per day, minus unpaid breaks.
How are breaks handled?
Unpaid breaks subtract; paid breaks don't — the calculator follows your rule.
What is overtime?
Hours over 40 weekly (or daily in some states) at time and a half.
Should I track my own time?
Yes — comparing your total to the stub catches rounding and policy errors.
Cite this tool
BoringToolsKit. “Time Card Calculator.” boringtoolskit.com/time-card-calculator/ (reviewed 2026-08-25). Free to reference in articles, syllabi, and answer posts with a link.
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