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# Duration converter

Convert between seconds, minutes, hours, days, and weeks.

Every unit here is a **fixed elapsed duration**, a day is always exactly 86,400,000 ms, a week always 604,800,000 ms. Nothing is calendar-relative: there are no months (28-31 days) or years, and daylight-saving changes do not apply to elapsed time. If you need calendar math ("add one month", "same time next week across a DST change"), that is date arithmetic, not duration conversion.
Duration. A plain number, or an expression like `1h 30m`Input unit

Enter a duration above to see it in every unit. The unit selector is ignored when you type an expression like `90m`.
Paste, drop, or type to begin. Everything stays on this device.

## More time & date tools

- [Timestamp converter](/time/timestamp-converter)
- [Time zone converter](/time/timezone-converter)
[All time & date tools](/time)

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Canonical HTML: https://nutter.tools/time/duration-converter/
Markdown version: https://nutter.tools/time/duration-converter/index.md
Plain-text version: https://nutter.tools/time/duration-converter/index.txt
Agent index: https://nutter.tools/llms.txt