Unit Conversion

Convert numbers between two units quickly and precisely

Time Converter

Unit Conversion

Convert time units: seconds, hours, weeks, and nanoseconds

The time converter converts between nanosecond, microsecond, millisecond, second, minute, hour, day, week, month, and the Julian year. It's useful for project planning, sports analysis, and scientific time measurements down to the nanosecond range.

Key conversion factors:

  • 1 minute (min) = 60 seconds (s)
  • 1 hour (h) = 3,600 seconds
  • 1 day (d) = 86,400 seconds
  • 1 week (w) = 604,800 seconds
  • 1 month (average) ≈ 30.44 days – calculated as 1/12 of the Julian year, since calendar months vary in length
  • 1 Julian year (a) ≈ 365.25 days – accounts for leap years on average
  • 1 second (s) = 1,000 milliseconds (ms) = 1,000,000 microseconds (µs)

Applications:

  • Project management: converting working hours into days or weeks for scheduling
  • Sports: evaluating competition times from split seconds to marathon times
  • Technology & computing: reaction and processing times in milli- and microseconds
  • Astronomy: light travel times, such as the roughly 8 minutes and 20 seconds from the Sun to Earth

The time converter delivers precise results for project estimates, sports analysis, and technical measurement series alike. For temperature-dependent shelf life and half-lives, use our half-life calculator.

Frequently asked questions about converting time

A day has 86,400 seconds (24 hours * 60 minutes * 60 seconds). A week accordingly has 604,800 seconds.

The converter uses the Julian year, averaging 365.25 days, to correctly account for leap years on average (an extra day every 4 years). This gives more precise results over longer periods than a fixed assumption of 365 days.

The converter uses an average month of 1/12 of the Julian year, which equals about 30.44 days. This is an approximation, since real calendar months vary between 28 and 31 days.