How to convert hours to seconds
s = h × 3,600
Example: 5 h × 3,600 = 18,000 s
Hours to Seconds table
| Hours (h) | Seconds (s) |
|---|---|
| 0.5 h | 1,800 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 |
About these units
Hours (h): An hour is 60 minutes or 3,600 seconds.
Seconds (s): The second is the SI base unit of time, defined by the caesium-133 atom’s radiation frequency.
Frequently asked questions
How many seconds are in 1 hour?
1 hour equals 3,600 seconds.
How do I convert h to s?
Multiply the value in hours by 3,600. For example, 5 h × 3,600 = 18,000 s.
How do I convert seconds back to hours?
Multiply by 0.000277777778 (or divide by 3,600). 1 s = 0.000277777778 h.
What is an hour?
An hour is 60 minutes or 3,600 seconds.
Conversion factors come from exact international definitions (NIST SP 811, BIPM) where they exist. Results show up to 10 significant digits. Need every time unit at once? Use the Time Converter.