Convert fixed durations accurately between nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days and weeks with clear results.
Example: you have a duration of 2.5 hours. How many minutes is that?
This tool converts fixed durations. Months and years are excluded because their length can vary by calendar and year.
Result150 min 2.5 h = 150 min
One-unit equivalent1 h = 60 min A quick way to understand the relationship between the two units.
✓ Conversion factors match data and definitions from the National Institute of Standards and Technology (NIST)
How is the conversion calculated?The duration is converted to seconds exactly, then to the requested unit using fixed relationships such as 60 seconds per minute and 3,600 seconds per hour.
This calculation runs in your browser. Your values are not sent to our server.
Enter the duration, then choose the current unit and the unit you want to convert to.
Example: 2.5 hours equals exactly 150 minutes.
Use the swap button to reverse the units without typing the value again.
The tool converts the duration to seconds internally, then to the requested unit using fixed, precise relationships.
Months and years are excluded because their length is not always fixed; this converter focuses on units with fixed duration relationships.
FAQ
How many minutes are in one hour?
1 hour equals exactly 60 minutes.
How many seconds are in one day?
1 day equals exactly 86,400 seconds.
How many hours are in one week?
1 week equals exactly 168 hours.
How many milliseconds are in one second?
1 second equals exactly 1,000 milliseconds.
Why are months and years not included?
Months have different numbers of days, and leap years differ from common years. This tool therefore focuses on units with fixed duration relationships.