Work Hours Calculator — Add clock-in and clock-out times for each day, with optional unpaid break time. The calculator sums total hours, regular hours (under the daily/weekly OT threshold), and overtime hours, with a per-day breakdown.
All entries stay in your browser. Nothing is uploaded.
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What is work hours calculator?
Add clock-in and clock-out times for each day, with optional unpaid break time. The calculator sums total hours, regular hours (under the daily/weekly OT threshold), and overtime hours, with a per-day breakdown.
Useful for hourly employees tracking time cards, freelancers logging billable hours, small business owners running payroll, and anyone who needs to know how many hours they worked last week.
How to use it
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Add rows for each shift
Default 5-day week is set up — edit the rows for your actual days.
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Enter times as decimal hours
9 = 9:00, 9.5 = 9:30, 17.25 = 17:15.
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Set OT thresholds
Default is 8 hours/day and 40 hours/week (U.S. standard). Change to match your policy.
Examples
Mon–Fri 9–5 with 30 min lunch
Standard salaried week tracked for billing.
Result: 37.5 h regular, 0 h overtime
4 days × 10 h
Compressed workweek.
Result: 32 h regular, 8 h overtime (if daily threshold is 8)
Frequently asked questions
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Last reviewed: 2026-08-22