Hours to Seconds
1 hour = 3,600 seconds. To convert hours (h) to seconds (s), multiply by 3,600.
Converter
How to convert hours to seconds
s = h × 3,600 Example: convert 8 hours to seconds.
8 h × 3,600 = 28,800 s
The same relationship in reverse: 1 second = 0.000277777778 hours, so you can also divide by 0.000277777778. Need the other direction? Use the seconds to hours converter.
You will typically need this conversion for physics problems and data logging.
Hours to Seconds 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 |
| 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 |
| 75 h | 270,000 s |
| 100 h | 360,000 s |
| 250 h | 900,000 s |
| 500 h | 1,800,000 s |
| 1,000 h | 3,600,000 s |
Values rounded to 8 significant figures. The converter above shows up to 12.
About the units
Hour (h)
Sixty minutes, or 3,600 seconds.
Second (s)
The SI base unit of time, defined by 9,192,631,770 oscillations of the caesium-133 atom.
Frequently asked questions
How many seconds are in a hour?
1 hour = 3,600 seconds. Going the other way, 1 second = 0.000277777778 hours.
How do I convert hours to seconds?
To convert hours to seconds, multiply by 3,600. The formula is s = h × 3,600.
What is 8 h in s?
8 hours is 28,800 seconds (8 h × 3,600 = 28,800 s).