Time Calculator
Add or subtract hours, minutes and seconds, or find the duration between two dates and times.
Add or Subtract Durations
=4h 15m 0s
Time Between Two Dates
What Is the Time Calculator?
The Time Calculator does arithmetic with time. Add or subtract two durations (hours, minutes, seconds) and get the result, or pick two dates and times to find the exact duration between them. Everything is computed locally.
How It Works
For duration math, enter two h/m/s values and choose add or subtract. For the gap between two moments, pick a start and end date-time. Results update instantly.
When to Use It
Use it for timing tasks, adding up durations, working out elapsed time, or planning schedules.
Frequently Asked Questions
- Can it handle durations over 24 hours?
- Yes. Results are shown in total hours, minutes and seconds without wrapping at 24 hours.
Last reviewed: 2026-06-27
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