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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.
Enter a duration above to see it in every unit. The unit selector is ignored when you type an expression like 90m.
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