Time Duration Calculator
Calculate the duration between two times
100% private. Your files and inputs never leave your device — everything runs locally in your browser.
How to Use Time Duration Calculator
Calculate the duration between two times. No signup, no uploads, no watermarks.
- 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 choose Time Duration Calculator?
- No uploads — your files never leave your device.
- Free forever with no signup, no watermarks, and no limits.
- Works on any device with a modern browser — no installs.
- Fast, private, and built for getting the job done in seconds.
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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