Convert hours to seconds
1 h = 3,600 s. Change the amount below, or read the formula and the reference table further down.
1 hour equals
seconds
1 h = 3,600 s
The formula
Hours and seconds both measure time from the same zero, so a single multiplier does the job.
s = h × 3,600
Going the other way? Convert seconds to hours.
Hours to seconds table
Common values, rounded for reading.
| Hours (h) | Seconds (s) |
|---|---|
| 1 | 3,600 |
| 2 | 7,200 |
| 3 | 10,800 |
| 4 | 14,400 |
| 5 | 18,000 |
| 6 | 21,600 |
| 7 | 25,200 |
| 8 | 28,800 |
| 9 | 32,400 |
| 10 | 36,000 |
| 15 | 54,000 |
| 20 | 72,000 |
| 25 | 90,000 |
| 30 | 108,000 |
| 40 | 144,000 |
| 50 | 180,000 |
| 75 | 270,000 |
| 100 | 360,000 |
| 250 | 900,000 |
| 500 | 1,800,000 |
| 1,000 | 3,600,000 |
Questions people ask
- How many seconds are in a hour?
- One hour equals 3,600 seconds.
- How do I convert hours to seconds by hand?
- Multiply the number of hours by 3,600. For a rough check, 3,600 is close enough for most everyday use.
- What is 1 hour in seconds?
- 1 hour is 3,600 seconds.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.