Time Duration Calculator
Work out the duration between two clock times, including overnight shifts and unpaid breaks.
Inputs
Formula
- Duration = end − start (+24 h if it crosses midnight) − breaks
Timesheets are easy to get wrong when a shift crosses midnight or a break has to come out. This adds a day automatically when the end time is earlier than the start, subtracts unpaid breaks and converts the result into decimal hours for payroll.
Step-by-step calculation
- 1
Raw duration
end − start
510 min
- 2
After break
− break
480 min
Frequently asked questions
What does the Time Duration Calculator do?
Work out the duration between two clock times, including overnight shifts and unpaid breaks. The Time Duration Calculator on OneCalcApp returns the result instantly as you type, together with the formula and the substituted values.
How do I use the Time Duration Calculator?
Enter your values in the input fields, choose the relevant units or options, and the Time Duration Calculator recalculates automatically. You can copy, print or export the result.
Is the Time Duration Calculator free to use?
Yes. The Time Duration Calculator is completely free, needs no sign-up and has no usage limit on OneCalcApp.
How accurate is the Time Duration Calculator?
It uses the standard formula Duration = end − start (+24 h if it crosses midnight) − breaks and full double-precision arithmetic, so results match a manual calculation to the displayed number of digits.
Does the Time Duration Calculator work on mobile and offline?
Yes. The Time Duration Calculator runs entirely in your browser on phones, tablets and desktops, and your inputs never leave your device.
Where can I find related tools?
OneCalcApp hosts 300+ calculators and converters, including the full Date & Time collection. Related tools are linked at the bottom of every page.
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