Time converter
Convert seconds, minutes, hours, days, weeks, months and years.
- ๐บ๐ธ US federal & state rules
- NIST SP 811 conversion factors
- See sources
min to h
1.5 h
90 min = 1.5 h
- 1 min
- 0.01666666667 h
- 1 h
- 60 min
Results are rounded to 10 significant digits.
Common values, min to h
| 1 min | 0.0166667 h |
|---|---|
| 2 min | 0.0333333 h |
| 5 min | 0.0833333 h |
| 10 min | 0.166667 h |
| 15 min | 0.25 h |
| 30 min | 0.5 h |
| 45 min | 0.75 h |
| 60 min | 1 h |
| 90 min | 1.5 h |
| 100 min | 1.66667 h |
| 120 min | 2 h |
90 min in every unit
| Milliseconds (ms) | 5,400,000 ms |
|---|---|
| Seconds (s) | 5,400 s |
| Minutes (min) | 90 min |
| Hours (h) | 1.5 h |
| Days | 0.0625 days |
| Weeks | 0.008928571429 weeks |
| Months (average) | 0.002053430255 months |
| Years (average) | 0.0001711191879 years |
Show the math
| To s | 90 min ร 60 = 5,400 s |
|---|---|
| To h | 5,400 s รท 3,600 = 1.5 h |
What to do next
How it works
Every value goes through seconds. A minute is 60 seconds, an hour 3,600, a day 86,400 and a week 604,800. Years use the Gregorian average of 365.2425 days, which accounts for leap years.
Things to keep in mind
Months and years are averages, so 1 month here is not a specific calendar month. Payroll and leases usually count real calendar days.
Conversion factors
| 1 days equals | Value |
|---|---|
| Milliseconds (ms) | 86,400,000 ms |
| Seconds (s) | 86,400 s |
| Minutes (min) | 1,440 min |
| Hours (h) | 24 h |
| Weeks | 0.1428571429 weeks |
| Months (average) | 0.03285488408 months |
| Years (average) | 0.002737907007 years |
Sources
Rules applied as of 2026-10-19. See the sources below for details.
- NIST SP 811, Appendix B.8: Factors for units listed alphabeticallyChecked 2026-10-19
- NIST: U.S. survey foot retired (acre now uses the international foot)Checked 2026-10-19
Frequently asked questions
How do I convert minutes to hours?
Divide by 60. 90 minutes is 1.5 hours, and 45 minutes is 0.75 hours.
How many seconds are in a day?
86,400. That is 24 hours ร 60 minutes ร 60 seconds.
How long is a month here?
An average Gregorian month, 30.436875 days. For exact calendar dates use a date calculator instead.
How do I write 7 hours 45 minutes as a decimal for a timesheet?
Divide the minutes by 60 and add them to the hours. 45 รท 60 = 0.75, so it is 7.75 hours.