Time Converter

Convert between nanoseconds microseconds milliseconds seconds minutes hours days weeks months quarters years decades centuries and millennia. Larger units use Gregorian averages as noted below.

Choose the source unit
Choose the target unit

Reference

  • 1 minute = 60 seconds
  • 1 hour = 60 minutes = 3600 seconds
  • 1 day = 24 hours = 86400 seconds
  • 1 week = 7 days
  • 1 year (avg Gregorian) = 365.2425 days
  • 1 month (avg) = 1/12 of a year
  • 1 quarter (avg) = 3 months (avg)
Built with Bootstrap 4 and vanilla JS. Calculations use double-precision floating point.