1 hour = 3600 seconds
Convert hours to seconds.
Both directions on one page — swap the units and the whole thing runs backwards.
Type a value, or “5cm to in”
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The formula
s = h × 3600
Worked through with a real value: 10 hours = 36000 seconds.
Going the other way: h = s × 0.000277778, so 1 second = 0.000277778 hours.
What each unit is
- hour h
- Sixty minutes, the everyday unit for schedules, appointments and travel time.
- second s
- The SI base unit of time, defined since 1967 as 9,192,631,770 cycles of cesium-133 radiation.
Where these come from
- 1 hour = 3600 seconds
Every other number on this page is computed from those, and each category is pinned to conversions worked out by hand from the units' primary definitions before it ships.
Conversion tables
| hours (h) | seconds (s) |
|---|---|
| 1 | 3600 |
| 2 | 7200 |
| 3 | 10800 |
| 4 | 14400 |
| 5 | 18000 |
| 6 | 21600 |
| 7 | 25200 |
| 8 | 28800 |
| 9 | 32400 |
| 10 | 36000 |
| 20 | 72000 |
| 25 | 90000 |
| 50 | 180000 |
| 75 | 270000 |
| 100 | 360000 |
| seconds (s) | hours (h) |
|---|---|
| 1 | 0.000277778 |
| 2 | 0.000555556 |
| 3 | 0.000833333 |
| 4 | 0.00111111 |
| 5 | 0.00138889 |
| 6 | 0.00166667 |
| 7 | 0.00194444 |
| 8 | 0.00222222 |
| 9 | 0.0025 |
| 10 | 0.00277778 |
| 20 | 0.00555556 |
| 25 | 0.00694444 |
| 50 | 0.0138889 |
| 75 | 0.0208333 |
| 100 | 0.0277778 |
Questions
How many seconds are in a hour?
1 hour = 3600 seconds.
How do I convert hours to seconds?
Use s = h × 3600. For example, 10 hours = 36000 seconds.
How many hours are in one second?
1 second = 0.000277778 hours.
What is 10 hours in seconds?
10 hours = 36000 seconds.
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