Hours to Seconds
Convert hours (h) to seconds (s). Type in either box; the other updates as you go.
1 hour equals3,600 s
1 second equals0.0002777777778 h
Formulas = h × 3,600
How to convert hours to seconds
To convert hours to seconds, multiply the number of hours by 3,600.
s = h × 3,600
Example
Convert 5 hours to seconds:
5 h × 3,600 = 18,000 s
Hour to second conversion chart
| Hours (h) | Seconds (s) |
|---|---|
| 1 h | 3,600 s |
| 2 h | 7,200 s |
| 3 h | 10,800 s |
| 4 h | 14,400 s |
| 5 h | 18,000 s |
| 6 h | 21,600 s |
| 7 h | 25,200 s |
| 8 h | 28,800 s |
| 9 h | 32,400 s |
| 10 h | 36,000 s |
| 12 h | 43,200 s |
| 15 h | 54,000 s |
| 20 h | 72,000 s |
| 25 h | 90,000 s |
| 30 h | 108,000 s |
| 40 h | 144,000 s |
| 50 h | 180,000 s |
| 60 h | 216,000 s |
| 70 h | 252,000 s |
| 75 h | 270,000 s |
| 80 h | 288,000 s |
| 90 h | 324,000 s |
| 100 h | 360,000 s |
| 150 h | 540,000 s |
| 200 h | 720,000 s |
| 250 h | 900,000 s |
| 500 h | 1,800,000 s |
| 1,000 h | 3,600,000 s |
Going the other way? See the seconds to hours chart.
About the units
Hour (h)
An hour is 60 minutes, or 3,600 seconds.
Second (s)
The second is the SI base unit of time, defined by 9,192,631,770 oscillations of a cesium-133 atom.
Frequently asked questions
How many seconds are in an hour?
There are 3,600 seconds in an hour.
How many hours are in a second?
There are 0.0002777777778 hours in a second.
How do you convert hours to seconds?
To convert hours to seconds, multiply the number of hours by 3,600.
What is 5 hours in seconds?
5 hours equals 18,000 seconds.
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