Time conversion chart
Convert between units of time: seconds, minutes, hours, days, weeks, and years. The relationships are fixed, so a simple table covers every common conversion.
Time conversions
| Unit | Equivalent |
|---|---|
| 1 minute | 60 seconds |
| 1 hour | 60 minutes (3,600 seconds) |
| 1 day | 24 hours (1,440 minutes) |
| 1 day | 86,400 seconds |
| 1 week | 7 days (168 hours) |
| 1 month | about 30.44 days (average) |
| 1 year | 365 days (8,760 hours) |
| 1 year | 52 weeks (plus 1 day) |
The smaller units are exact: 60 seconds to a minute, 60 minutes to an hour, 24 hours to a day. Larger units vary slightly, since months differ in length and a year is closer to 365.25 days, which is why leap years add a day every four years.
Need other conversions?
See the Metric Conversion Chart and other references.
Exact and approximate units
Seconds, minutes, hours, and days nest neatly: multiply through to convert. A day is 24 times 3,600, or 86,400 seconds. Weeks are exactly 7 days. Months and years are where it gets fuzzy: months range from 28 to 31 days, and a year is about 365.25 days, the extra quarter-day handled by leap years.
Leap years
Earth takes about 365.25 days to orbit the Sun, so the calendar adds a leap day every four years to stay aligned, with a fine adjustment skipping some century years. This is why a year is usually 365 days but occasionally 366. For most conversions, 365 days is close enough.
FAQ
How many seconds are in a day?
86,400 seconds: 24 hours times 60 minutes times 60 seconds.
How many hours are in a year?
About 8,760 hours, based on 365 days times 24 hours.
How many weeks are in a year?
52 weeks plus one extra day (or two in a leap year).