Time Duration Calculator — Elapsed Start to End
Calculate the duration between two times
How to Use Time Duration Calculator
Calculate the duration between two times No signup, and nothing gets uploaded for most use.
- 1
Enter your numbers in the input fields.
- 2
Choose the calculation options or frequency.
- 3
The result updates instantly as you type.
- 4
Review the breakdown, chart, or schedule, and copy the answer.
Why you might like it
- Nothing to upload — the work happens on your device.
- Free with no signup, no watermarks, and no daily limits.
- Works in any modern browser on any device — nothing to install.
- Usually done in a few seconds, so it doesn't get in your way.
Frequently Asked Questions
What happens when the end time is before the start time?▾
The calculator assumes the span crosses midnight and adds 24 hours. For example 23:00 to 01:00 gives 2 hours.
Why show decimal hours?▾
Decimal hours (e.g. 8.5 instead of 8:30) are the standard unit for payroll and time tracking, so the calculator provides both formats.
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