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Time Converter

Spelling: American | British
Use this time converter to convert instantly between milliseconds, seconds, minutes, hours, days, weeks, months, years and other metric and imperial time units.

Disclaimer: Whilst every effort has been made in building our calculator tools, we are not to be held liable for any damages or monetary losses arising out of or in connection with their use. Full disclaimer.

To learn about weeks and years conversions, see our article how many weeks are in a year? Alternatively, you may wish to calculate the number of days between two dates.

Some modern and vintage watches and clocks represent the hours of the day using Roman numerals. If you need help translating these you can use our roman numerals translation tool.

Conversion units for the Time Converter

Attoseconds (as), Days (d), Femtoseconds (fs), Hours (h), Microseconds (µs), Milliseconds (ms), Minutes (min), Months, Nanoseconds (ns), Picoseconds (ps), Seconds (s), Shakes, Weeks, Years (a),

Popular individual converters:

Hours and seconds, minutes and hours, minutes and days


To help with productivity, we now set a cookie to store the last units you have converted from and to. This means that when you re-visit this time converter, the units will automatically be selected for you.