About the Time Converter
Convert durations between milliseconds, seconds, minutes, hours, days, weeks and years.
Key features
- Convert milliseconds, seconds, minutes, hours, days, weeks and years
- Years use the average 365.25 days (accounts for leap years)
- Decimal hours for timesheets
- Swap direction with one click
- See the value in every unit at once
- Free, instant, no sign-up
Time unit conversion
Convert durations for timesheets, video lengths, cooking, project estimates, programming timeouts and science problems.
Conversion factors
| Unit | Seconds |
|---|---|
| 1 millisecond | 0.001 |
| 1 minute | 60 |
| 1 hour | 3,600 |
| 1 day | 86,400 |
| 1 week | 604,800 |
| 1 year (365.25 d) | 31,557,600 |
Decimal hours (timesheets)
| Minutes | Decimal hours |
|---|---|
| 6 min | 0.1 |
| 15 min | 0.25 |
| 20 min | 0.333 |
| 30 min | 0.5 |
| 45 min | 0.75 |
| 50 min | 0.833 |
To bill 2 hours 20 minutes, enter 2.333 hours.
Programming reference
Timeouts and intervals are usually set in milliseconds:
| Duration | Milliseconds |
|---|---|
| 1 second | 1,000 |
| 30 seconds | 30,000 |
| 5 minutes | 300,000 |
| 1 hour | 3,600,000 |
| 1 day | 86,400,000 |
Related calculators
Find the time between two clock times with the Time Duration Calculator, or between dates with the Date Difference Calculator.
How to use the Time Converter
- Enter your numbers in the fields above. Units and options can be changed at any time.
- The result updates instantly as you type; there's no calculate button to press.
- Check the breakdown under the main result for the details behind the number.
- Adjust the inputs to compare scenarios, for example a different rate or term.