Convert hours to seconds
Convert hours (h) to seconds (s). 1 h = 3,600 s, and 1 s = 0.000277778 h.
Hours to Seconds formula
s = h × 3,600
Multiply the number of hours by 3,600.
Example: To convert 1 h to seconds: 1 × 3,600 = 3,600 s.
Quick answers
- What is 1 h in seconds?
- 1 h = 3,600 s
- What is 8 h in seconds?
- 8 h = 28,800 s
- What is 24 h in seconds?
- 24 h = 86,400 s
- What is 40 h in seconds?
- 40 h = 144,000 s
Hours to Seconds conversion table
Seconds to Hours table| hours (h) | seconds (s) |
|---|---|
| 0.25 h | 900 s |
| 0.5 h | 1,800 s |
| 0.75 h | 2,700 s |
| 1 h | 3,600 s |
| 1.5 h | 5,400 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 |
| 8 h | 28,800 s |
| 10 h | 36,000 s |
| 12 h | 43,200 s |
| 24 h | 86,400 s |
| 36 h | 129,600 s |
| 40 h | 144,000 s |
| 48 h | 172,800 s |
| 72 h | 259,200 s |
| 100 h | 360,000 s |
| 168 h | 604,800 s |
Frequently asked questions
How many seconds are in an hour?
There are 3,600 seconds in an hour (1 h = 3,600 s).
How do I convert hours to seconds?
Multiply the number of hours by 3,600. To convert 1 h to seconds: 1 × 3,600 = 3,600 s.
Is the Hours to Seconds conversion exact?
Yes. Both units are defined exactly, so 1 hour is exactly 3,600 seconds. Results on this page are rounded to six significant digits; pick more decimals in the converter if you need them.
What is 1 h in seconds?
1 h = 3,600 s.
How do I convert seconds back to hours?
Use the reverse relationship: 1 s = 0.000277778 h. The Seconds to Hours page has a converter and a full table.
More time conversions
- Hours to Minutes
- Hours to Days
- Hours to Weeks
- Minutes to Seconds
- Days to Seconds
- Milliseconds to Seconds
- Seconds to Minutes
- Seconds to Days
- Minutes to Hours
- Minutes to Days
- Days to Minutes
- Days to Hours