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Time Converter

Convert time units instantly

Convert between milliseconds, seconds, minutes, hours, days, weeks, months and years - instantly as you type

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About the time converter

The time converter translates a value between every common unit of duration, from milliseconds up to years. Type any amount, pick the unit you are converting from and the unit you are converting to, and the result updates live as you type. Use the swap button to reverse the direction in a single click.

Months are calculated as the average month length of 30.44 days (365.25 divided by 12) and years as 365.25 days, which accounts for leap years. This keeps conversions consistent regardless of which calendar month you happen to be working in.

Supported units

  • Milliseconds, seconds, minutes, hours
  • Days, weeks, months, years

How to use the time converter

  1. Enter a value

    Type the duration you want to convert.

  2. Pick the from and to units

    Select the unit you are converting from and the unit you want to convert to.

  3. Swap if needed

    Use the swap button to reverse the conversion direction instantly.

Frequently asked questions

How are months and years calculated?
A month uses the average length of 30.44 days (365.25 / 12) and a year uses 365.25 days, which accounts for leap years so conversions stay consistent.
Are the conversions accurate?
Yes. Every unit is converted through seconds using standard, internationally recognized conversion factors.
Can I convert very small or very large durations?
Yes. The converter handles everything from milliseconds to years, and automatically switches to scientific notation for extremely large or small results.
Does it work offline?
The converter runs entirely in your browser, so once the page is loaded it works without an internet connection.
Is the time converter free?
Yes, it is completely free and requires no account or sign-up.

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