Convert hours to seconds
1 h = 3600 s — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
3600s
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1 h = 3600 s
Show this value in all 22 time units
- Kiloseconds ks 3.6
- Seconds s 3600
- Milliseconds ms 3 600 000
- Microseconds µs 3 600 000 000
- Nanoseconds ns 3 600 000 000 000
- Picoseconds ps 3 600 000 000 000 000
- Femtoseconds fs 3.6e+18
- Attoseconds as 3.6e+21
- Minutes min 60
- Hours h 1
- Days d 0.041 666 666 666 7
- Weeks wk 0.005 952 380 952 38
- Fortnights fn 0.002 976 190 476 19
- Month (average)s mo 0.001 368 953 503 49
- Year (Gregorian)s yr 0.000 114 079 458 625
- Year (Julian)s a 0.000 114 077 116 131
- Year (tropical)s a (trop) 0.000 114 079 555 45
- Decades dec 0.000 011 407 945 862 5
- Centuries c 0.000 001 140 794 586 25
- Millennia ka 0.000 000 114 079 458 625
- Shakes shake 360 000 000 000
- Planck times tₚ 6.67749038395e+46
Every row is Hour (h) converted through the second, in exact rational arithmetic.
How to convert hours to seconds
Multiply the number of hours by 3600 to get seconds.
The exact factor is 3600 .
Hour to Second conversion table
| Hours (h) | Seconds (s) |
|---|---|
| 1 h | 3600 |
| 2 h | 7200 |
| 3 h | 10 800 |
| 5 h | 18 000 |
| 10 h | 36 000 |
| 20 h | 72 000 |
| 25 h | 90 000 |
| 50 h | 180 000 |
| 100 h | 360 000 |
| 250 h | 900 000 |
| 500 h | 1 800 000 |
| 1000 h | 3 600 000 |
Second to Hour conversion table
| Seconds (s) | Hours (h) |
|---|---|
| 1 s | 0.000 277 777 78 |
| 2 s | 0.000 555 555 56 |
| 3 s | 0.000 833 333 33 |
| 5 s | 0.001 388 888 9 |
| 10 s | 0.002 777 777 8 |
| 20 s | 0.005 555 555 6 |
| 25 s | 0.006 944 444 4 |
| 50 s | 0.013 888 889 |
| 100 s | 0.027 777 778 |
| 250 s | 0.069 444 444 |
| 500 s | 0.138 888 89 |
| 1000 s | 0.277 777 78 |
Frequently asked
How many seconds are in a hour?
One hour equals 3600 seconds (h → s). That figure is exact, not rounded.
How do you convert hours to seconds?
Multiply the number of hours by 3600 to get seconds.
What is 1 s in hours?
One second is 0.0002777777778 hours.
What is 10 h in s?
10 h = 36 000 s.