Time Converter: Seconds, Minutes, Hours, Days
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Formula
1 h = 60 minAll Results
ms 3,600,000
s 3,600
min 60
h 1
d 0.0416667
wk 0.00595238
mo 0.00136895
yr 0.000114079
Quick Reference Table: Hour → Minute
| Value (h) | Result (min) |
|---|---|
| 1 h | 60 min |
| 2 h | 120 min |
| 6 h | 360 min |
| 12 h | 720 min |
| 24 h | 1, |
| 48 h | 2, |
| 72 h | 4, |
| 168 h | 10, |
| 720 h | 43, |
About Time Conversions
Converting time helps with planning, project schedules, scientific calculations and programming. There are 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and 7 days in a week. An average month has 30.436875 days (365.2425 ÷ 12). An average year has 365.2425 days: the Gregorian calendar adds a leap day every 4 years, except in century years not divisible by 400.
Everyday Durations
How long things take, from a blink to a week. Sunlight needs about 8 minutes 20 seconds to reach Earth.
| Event | s | min | h |
|---|---|---|---|
| Blink of an eye | 0.1 | 0.001667 | 0.00002778 |
| One heartbeat | 0.86 | 0.01433 | 0.0002389 |
| One minute | 60 | 1 | 0.01667 |
| Sunlight reaches Earth | 499 | 8.317 | 0.1386 |
| Football match (90 min) | 5,400 | 90 | 1.5 |
| Feature film | 7,200 | 120 | 2 |
| Working day | 28,800 | 480 | 8 |
| One day | 86,400 | 1,440 | 24 |
| One week | 604,800 | 10,080 | 168 |
History of the second
For most of history the second was a fraction of a day, set by the turning Earth. Atomic clocks turned out to be steadier than the planet, so the second now comes from an atom, and clocks are nudged to stay in step with the Earth.
- The second was defined as a fraction of the tropical year 1900, because the length of the day turned out not to be constant.
- The second became the duration of 9,192,631,770 periods of the radiation of the cesium-133 atom, the same duration the second still has.
- Leap seconds began: an extra second is added to atomic time now and then, so clocks stay within a second of the Earth's rotation.
- The General Conference on Weights and Measures decided that by 2035 clocks may drift further from the Earth's rotation before being corrected, which will end leap seconds as they are now.
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