How to calculate timesheet hours with a lunch break
For each workday, subtract your clock-in time from your clock-out time and then subtract any unpaid lunch or break minutes. Add the daily totals to get weekly hours.
Basic formula
Worked time = Clock out − Clock in − unpaid break
If a shift ends after midnight, this calculator treats it as an overnight shift and continues into the next day.
Example
If you clock in at 9:00 AM, clock out at 5:30 PM, and take a 30-minute unpaid lunch, the calculator returns 8.00 worked hours.
Overtime and pay
You can choose an overtime threshold and multiplier. These settings are configurable because overtime rules differ by employer and jurisdiction. The calculator does not provide legal or payroll advice.
Frequently asked questions
Does the calculator subtract lunch automatically?
Yes. Enter the unpaid break in minutes for each day. A paid lunch should not be entered as an unpaid break.
Can it calculate overnight shifts?
Yes. If clock-out is earlier than clock-in, the calculator assumes the shift ended the following day.
What does decimal hours mean?
Decimal hours express minutes as a fraction of an hour. For example, 8 hours 30 minutes equals 8.50 decimal hours.