Time Converter

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

Enter a value, choose the units, and see the result plus every other time unit.

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Minute → Hour

Time Converter

Convert time spans between nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days, weeks, fortnights, months, years, decades, centuries, and millennia. Enter a duration once and read it in every unit – from benchmark timings in microseconds to project plans in weeks.

Fixed and average units

Seconds, minutes, hours, days, and weeks have exact lengths. Months and years do not – February is shorter than March and leap years add a day – so the converter uses the Gregorian averages:

Unit Seconds
1 minute 60
1 hour 3,600
1 day 86,400
1 week 604,800
1 month (average) 2,629,746
1 year (Gregorian) 31,556,952

For calendar-accurate differences between two dates, count the actual days instead of converting months.

Developer use cases

  • Timeouts and cache TTLs: a config asks for milliseconds, you think in minutes – 15 minutes is 900,000 ms.
  • Cron and retention policies: 30 days is 2,592,000 seconds, a common max-age value.
  • Performance numbers: 250 µs is 0.25 ms; 1.2 million ns is 1.2 ms.
  • Unix time: 1,000,000,000 seconds after 1 January 1970 was September 2001 – about 31.7 years.

Everyday examples

A 90-minute movie is 1.5 hours. A 40-hour work week is about 1.67 days. A 6-week project is 42 days or 1,008 hours.

Add and subtract durations such as 2:45 + 1:30 with the Time Calculator. For rates like revolutions per minute or events per second, use the Frequency Converter.

Frequently Asked Questions

A Gregorian year of 365.2425 days (31,556,952 seconds), which averages leap years. A month is one twelfth of that: 30.436875 days.

About 31.69 years. One million seconds is only about 11.6 days.

This converter gives decimal results (90 minutes = 1.5 hours). To add or subtract durations in hours:minutes format, use the Time Calculator.