Hours to Seconds: the quick answer
1 h = 3,600 s
1 hour equals 3,600 seconds
To convert hours to seconds, multiply the value by 3,600. To go the other way, multiply seconds by 0.000277778 to get hours.
Enter details
1 hour =
3,600 seconds
1 second =
0.000277778 hours
Formula
s = h × 3,600
Handy values
5 h = 18,000 s · 10 h = 36,000 s · 100 h = 360,000 s
Conversion at a glance
Formula
Hours to Seconds
s = h × 3,600
Seconds to Hours
h = s × 0.000277778
Where
- h = the time in hours
- s = the time in seconds
Every unit here is defined by its time in seconds, so the conversion factor is (seconds per hour) ÷ (seconds per second).
Hours to Seconds conversion table
| 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 |
| 14 h | 50,400 s |
| 15 h | 54,000 s |
| 20 h | 72,000 s |
| 21 h | 75,600 s |
| 24 h | 86,400 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 |
| 75 h | 270,000 s |
| 80 h | 288,000 s |
| 100 h | 360,000 s |
| 200 h | 720,000 s |
| 250 h | 900,000 s |
| 300 h | 1,080,000 s |
| 400 h | 1,440,000 s |
| 500 h | 1,800,000 s |
| 750 h | 2,700,000 s |
| 1,000 h | 3,600,000 s |
Worked examples
About these units
Hour (h). An hour is 60 minutes (3,600 seconds).
Second (s). The second is the SI base unit of time, defined by the caesium-133 atom.
Frequently asked questions
How many seconds are in one hour?
There are 3,600 seconds in one hour.
How do I convert hours to seconds?
Multiply the number of hours by 3,600. For example, 10 hours equal 36,000 seconds.
How many hours are in one second?
One second equals 0.000277778 hours.
How many seconds is 12 hours?
43,200 seconds. Other common values: 5 hours = 18,000 seconds and 100 hours = 360,000 seconds.
More time conversions
From hours
To seconds
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