Convert Hours to Seconds
1 hour is 3,600 s. One hour is exactly 3600 seconds.
One hour is 3600 seconds. To convert hours to seconds, multiply by 3600; to go the other way, divide by 3600 or multiply by 2.7778 × 10^-4. The factor is exact rather than rounded: it follows from BIPM SI Brochure. Sixty minutes, and exactly 3,600 seconds.
Factor checked against the defining standard · How we check
Seconds
3,600 s
- Hours × 3600
value * 36003,600 s
1 hour in every time unit
| Unit | Value | Exact factor |
|---|---|---|
| seconds | 3,600 s | × 3,600 |
| minutes | 60 min | × 60 |
| hours (as entered) | 1 h | — |
| days | 0.04166666667 d | × 0.0416666666667 |
| weeks | 0.005952380952 wk | × 0.00595238095238 |
| months | 0.001368953503 mo | × 0.00136895350349 |
| years | 0.0001140794586 yr | × 0.000114079458625 |
Factors are entered by hand from BIPM SI Brochure rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert hours to seconds?
- 1.Take the measurement in hours.
- 2.Multiply by 3600 — that is how many seconds fit in one hour.
- 3.To go back the other way, divide by 3600, or multiply by 2.7778 × 10^-4.
Hours to seconds conversion table
| Hours | Seconds |
|---|---|
| 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 |
| 12 h | 43,200 s |
| 15 h | 54,000 s |
| 20 h | 72,000 s |
| 25 h | 90,000 s |
| 50 h | 180,000 s |
| 100 h | 360,000 s |
What are hours and seconds?
- Hour (h)
- Sixty minutes, and exactly 3,600 seconds.
- Second (s)
- The SI base unit of time, fixed since 1967 by the caesium-133 hyperfine transition frequency of 9,192,631,770 Hz.
Source: BIPM SI Brochure — the second, and units accepted for use with the SI
Questions people actually ask
- How many seconds are in a hour?
- 3600. The SI base unit of time, fixed since 1967 by the caesium-133 hyperfine transition frequency of 9,192,631,770 Hz.
- How do I convert seconds back to hours?
- Divide by 3600, or multiply by 2.7778 × 10^-4 — they are the same operation.
Other time conversions
Seconds to hours — the same conversion the other way.