Time Duration Calculator
Works fully offline
Utility
Enter a start and end date and time to get the exact elapsed duration.
Overview
This differs from Days Between Dates by working at minute-level precision rather than whole calendar days — useful whenever the time of day matters, like measuring how long a shift, call, or process actually ran, not just which calendar dates it spanned.
Examples & Sample Data
Same-day span
Input
2026-08-15 09:15 to 2026-08-15 17:45
Output
8 hours, 30 minutes
Multi-day span
Input
2026-08-14 22:00 to 2026-08-16 06:30
Output
1 day, 8 hours, 30 minutes
How It Works
- Enter the start date and time.
- Enter the end date and time.
- The duration appears instantly as days, hours, and minutes, along with the total minutes.
Common Use Cases
Time tracking
Work out exactly how long a task, shift, or meeting lasted from its start and end timestamps.
SLA measurement
Confirm the elapsed time between an incident's start and resolution.
Tips & Best Practices
- Both fields use your browser's local date-and-time picker — there's no separate time zone selector here, so make sure both values are in the same zone. Use the Time Zone Converter first if they aren't.
Frequently Asked Questions
No. The calculation runs entirely in your browser using JavaScript.
No — the tool shows an error, since a negative duration isn't meaningful. Swap the two values if needed.
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