TIME, RUNNING, SHOPPING, AND QUICK MATH
Time Duration Calculator
Calculate elapsed hours after an optional break, including an overnight end time.
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Your result
Ready when you are.
Enter your values and select Calculate. Your result stays on this device.
How it works
Elapsed time = end time − start time − break, with an overnight adjustment when needed.
Assumptions
Single shift only; not a payroll, overtime, or legal timekeeping record.
Use case
time duration calculator: a clear planning check
Calculate elapsed hours after an optional break, including an overnight end time. The stated formula, assumptions, and result limits remain visible so the calculation can be checked in context.
Use a clear time duration calculator scenario with values you can verify before relying on the result.
Method and update
Last reviewed: 2026-08-10. This tool performs the stated formula locally in your browser using the values you enter.
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