Time converter
Type a duration, choose the units, and see the result and the same duration in every common unit. Months and years are not fixed lengths, so this converter uses the average Gregorian values and states them.
Runs in your browser: nothing you enter is sent anywhere.
How to use it
- Type a number. A dot or a comma works as the decimal separator.
- Choose the unit you have and the unit you need. The ⇄ button swaps them.
- The table below shows the same duration in all common units at once.
Definitions used
Every unit is converted through the second.
| Unit |
In seconds |
| 1 minute |
60 |
| 1 hour |
3,600 |
| 1 day |
86,400 |
| 1 week |
604,800 (7 days) |
| 1 month (average) |
2,629,746 (365.2425 days ÷ 12) |
| 1 year (average) |
31,556,952 (365.2425 days) |
| 1 decade, century, millennium |
10, 100, 1,000 years |
Worked example
Three years is 3 × 365.2425 = 1,095.7275 days, which is 26,297.46 hours or about 36 months. A 90-minute film is 90 × 60 = 5,400 seconds.
Good to know
- 1 year ≈ 52.1775 weeks.
- 1 day = 1,440 minutes.
- Results for months and years are averages and will not match a specific calendar span exactly.
Frequently asked questions
How long is a month in this converter?
One twelfth of the average Gregorian year, which is 30.436875 days. Real months have 28 to 31 days, so use this for averages, not for a specific calendar month.
How long is a year in this converter?
365.2425 days, the average length of a year in the Gregorian calendar (365 days, plus a leap day in 97 of every 400 years). That is 31,556,952 seconds.
How many seconds are in a day?
86,400, which is 24 × 60 × 60. Leap seconds are ignored here, as in most everyday time arithmetic.
How many hours are in a year?
On average 8,765.82 hours (365.2425 × 24). A common year of 365 days has 8,760 hours and a leap year of 366 days has 8,784.
How do I convert between two exact calendar dates?
Use a date calculator instead. This tool converts lengths of time, not the gap between two dates, which depends on which months and leap days lie between them.