Time Converter
Convert between milliseconds, seconds, minutes, hours, days, weeks, months and years. Free, fast and easy to use.
All units
| Millisecond | 3,600,000 ms |
|---|---|
| Second | 3,600 s |
| Minute | 60 min |
| Hour | 1 h |
| Day | 0.041666667 d |
| Week | 0.005952381 wk |
| Month (average) | 0.0013689535 mo |
| Year (average) | 0.00011407946 yr |
How it works
Choose two time units and type a value. Seconds, minutes, hours, days and weeks convert exactly; months and years use calendar averages (a year of 365.2425 days and a month of 30.44 days), so treat them as estimates.
Worked examples
- 1 d = 86,400 s
- 90 min = 1.5 h
- 1 yr = 8,765.82 h
Calculations run locally in your browser. Results are for information only — for engineering, electrical or financial decisions, verify the assumptions and applicable standards.
Frequently asked questions
How many seconds are in a day?
86,400 seconds (24 × 60 × 60). A week has 604,800 seconds.
How many hours are in a year?
About 8,766 hours on average; a common year of 365 days has 8,760 hours.