Hours to seconds converter
Seconds (s)
1 hour = 3,600 seconds
How to convert hours to seconds
s = h × 3600
Multiply the number of hours by 3600 to get seconds. Going the other way, divide by 3600 (or multiply by 0.000277777777778).
One hour is exactly defined as 3600 seconds (to 12 significant figures), and one second is 0.000277777777778 hours.
Worked examples
- Convert 5 hours: 5 × 3600 = 18,000 18,000 seconds.
- Convert 12.5 hours: 12.5 × 3600 = 45,000 45,000 seconds.
- Convert 250 hours: 250 × 3600 = 900,000 900,000 seconds.
Quick-reference table
| h | s |
|---|---|
| 1 | 3,600 |
| 2 | 7,200 |
| 3 | 10,800 |
| 5 | 18,000 |
| 10 | 36,000 |
| 15 | 54,000 |
| 20 | 72,000 |
| 25 | 90,000 |
| 50 | 180,000 |
| 75 | 270,000 |
| 100 | 360,000 |
| 1,000 | 3,600,000 |
| s | h |
|---|---|
| 1 | 0.0002777777778 |
| 2 | 0.0005555555556 |
| 3 | 0.0008333333333 |
| 5 | 0.001388888889 |
| 10 | 0.002777777778 |
| 15 | 0.004166666667 |
| 20 | 0.005555555556 |
| 25 | 0.006944444444 |
| 50 | 0.01388888889 |
| 75 | 0.02083333333 |
| 100 | 0.02777777778 |
| 1,000 | 0.2777777778 |
Related conversions
Frequently asked questions
How many seconds are in 1 hour?
1 hour equals 3,600 seconds.
What is the formula to convert hours to seconds?
Use s = h × 3600. Multiply the number of hours by 3600 to get seconds. Going the other way, divide by 3600 (or multiply by 0.000277777777778).
What is 100 hours in seconds?
100 hours is 360,000 seconds.