Convert Hour to Second
Use this free converter to change hours (h) into seconds (s). Hour and second both measure time. As a quick reference, 1 h equals 3600 s, and 1 s equals 0.00027777778 h.
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Second (s)
3600
1 h = 3600 s
Time conversion table
| Hour | Second |
|---|---|
| 0.01 | 36 |
| 0.1 | 360 |
| 0.5 | 1800 |
| 1 | 3600 |
| 2 | 7200 |
| 3 | 10800 |
| 5 | 18000 |
| 10 | 36000 |
| 20 | 72000 |
| 25 | 90000 |
| 50 | 180000 |
| 100 | 360000 |
| 1,000 | 3600000 |
How to convert Hour to Second
Multiply the hour value by 3600 to get seconds.
- Enter the number of hours you want to convert.
- The converter instantly shows the equivalent value in seconds.
- Worked example: 15 h × 3600 = 54000 s.
- Use the swap button to reverse the conversion (second to hour).
About these units
Hour (h)
- Definition
- An hour (h) is a unit of time equal to 60 minutes, or 3,600 seconds.
- History
- Ancient Egyptians divided day and night into twelve parts each, giving the 24-hour day.
- Current use
- Hours organise work, travel, and daily life around the globe.
Second (s)
- Definition
- The second (s) is the SI base unit of time, defined by the radiation frequency of the caesium-133 atom.
- History
- Once 1/86,400 of a day, it was redefined in 1967 using atomic transitions for far greater precision.
- Current use
- The second is the foundation of timekeeping in science, technology, and daily life.
Frequently asked questions
How many seconds are in a hour?
There are 3600 s in 1 h. To convert, multiply the number of hours by 3600.
How do I convert hours to seconds?
Multiply the hour value by 3600 to get seconds. For example, 10 h = 36000 s.
Is this hour-to-second converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Hour to other time units
| Unit | 1 Hour equals |
|---|---|
| Second (s) | 3600 s |
| Millisecond (ms) | 3600000 ms |
| Microsecond (µs) | 3600000000 µs |
| Minute (min) | 60 min |
| Day (d) | 0.041666667 d |
| Week (wk) | 0.005952381 wk |
| Month (mo) | 0.0013689254 mo |
| Year (yr) | 0.00011407712 yr |