Time Unit Converter
Instantly convert between time units from milliseconds to centuries. This calculator uses the Gregorian calendar average year (365.2425 days) for month and year conversions.
Time conversion is fundamental across science, project management, computing, and everyday life. While small units (seconds, minutes, hours) have exact relationships, larger units (months, years) require averaging due to calendar irregularities.
Exact Relationships:
- 1 minute = 60 seconds
- 1 hour = 60 minutes = 3,600 seconds
- 1 day = 24 hours = 86,400 seconds
- 1 week = 7 days = 604,800 seconds
Average Values (Gregorian Calendar):
- 1 year = 365.2425 days (accounts for leap years)
- 1 month = 30.436875 days (365.2425 / 12)
These averages are used by international standards for converting between months/years and smaller units.