hours to seconds converter
1 h = 3600 s (exact); 1 s = 0.000277778 h. To convert hours to seconds, multiply by 3600.
Conversion formula
s = h × 3600
Conversion table
| 1 hour | 3600.000 s |
|---|---|
| 5 hour | 18000.00 s |
| 10 hour | 36000.00 s |
| 25 hour | 90000.00 s |
| 100 hour | 360000.0 s |
Key facts
| 1 hour | 3600 s (exact) |
|---|---|
| 1 hour | 60 minutes |
| 1 day | 86,400 s |
| Formula | s = h × 3600 |
Frequently asked questions
How many seconds is 1 hour?
1 hour equals exactly 3600 seconds (60 minutes × 60 seconds).
How many seconds in a day?
One day equals 86,400 seconds (24 hours × 3600 seconds).
Reverse conversion
Printable A4 conversion cheat sheet — see the Downloads page