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Time converter

Convert between s, min, h, day, week and more. Free time converter, instant and accurate.

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This free online converter switches between ms, s, min, h, day and more. Type a value, pick the units to convert from and to, and read the exact result instantly — you also get the value in every other unit. No signup and no limits.

How to use it

  1. Type the value you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the converted result — and the value in every other unit — instantly.

Frequently asked questions

How do I convert ms to s?

For example, 1 ms equals 0.001 s. Enter any value above to convert instantly.

How do I convert s to ms?

For example, 1 s equals 1000 ms. Enter any value above to convert instantly.

How do I convert ms to min?

For example, 1 ms equals 1.667e-5 min. Enter any value above to convert instantly.

Which units does this converter support?

It converts between ms, s, min, h, day, week, month, year.

When is this conversion actually needed?

Answering a scheduling question exactly: how many working days until a deadline, what date falls sixty days out, and what time that is for a colleague elsewhere.

What goes wrong most often?

Counting days by subtracting dates and forgetting whether the endpoints are included. Inclusive and exclusive counts differ by one, which is the difference between meeting a deadline and missing it.

Where do the conversion factors come from?

Calendar arithmetic follows the proleptic Gregorian calendar and the IANA time-zone database, so daylight-saving transitions and leap years are handled. Public holidays vary by country and region and are not assumed.

How precise is the result?

The conversion is computed at full double precision and only rounded for display, so a value copied out carries every digit the factor justifies.

Is this converter free?

Yes — it's completely free and instant, with no signup and no limits.

Further reading

All guides →
ExplainerHow Daylight Saving Time Works: Spring Forward, Fall BackDaylight saving time shifts clocks an hour in spring and back in autumn. Learn spring-forward and fall-back, why one day is 23 hours and another 25, and how US and EU dates differ.ExplainerSeconds, Minutes and Hours: How Time Units Fit TogetherThe relationships behind 60 seconds, 60 minutes, 24 hours and 86,400 seconds a day, with quick conversions you can reuse.How-toHow to Convert Time Zones: UTC Offsets, Day Rollover and DSTConverting between time zones is adding or subtracting the difference in UTC offsets, then handling any day rollover. Learn the method, a worked example, and the DST caveat.How-toCountdown to New Year: How to Count the Days and Weeks LeftBuilding a countdown to a target date is just counting whole days from today to the target, then splitting that total into weeks. Learn the method with a worked example.ExplainerReading and Writing Military Time0800 is not “eight o'clock” and not “08:00” — it is “zero eight hundred”, with a zone letter on the end. The four digits, the spoken form, midnight at 0000, the argument about 2400, and the reason 12-hour notation cannot settle noon.GuideThe Pomodoro Method: How Long to Work and How Long to RestTwenty-five and five come from Francesco Cirillo's method, not from a trial. What the research actually measured is task switching and the cost of getting back in — and the reason a fixed interval helps is not that 25 minutes is optimal. Plus what the planner really returns, including the long break it quietly leaves out.