Hours to Seconds Converter
Convert hour to second instantly. Type a value below — the result updates as you type.
When you need to convert hour to second
Time conversions help with project planning, billing, cooking, subscriptions and any schedule that mixes seconds, minutes, hours, days or longer spans.
Typical values: 0.5 h is about 1800 s, and 5 h works out to roughly 18000 s. Because the ratio is fixed at 3600, you can scale any amount linearly — doubling the hours doubles the seconds.
Calendar months and years vary in length, so longer time conversions use standard average values rather than a fixed calendar date.
How to convert hour to second
One hour equals 3600 seconds. To convert, multiply the number of hours by 3600:
seconds = hours × 3600
For example, 10 hours × 3600 = 36000 seconds.
Hours to seconds conversion table
| Time (h) | Seconds (s) |
|---|---|
| 1 h | 3600 s |
| 2 h | 7200 s |
| 3 h | 10800 s |
| 5 h | 18000 s |
| 10 h | 36000 s |
| 20 h | 72000 s |
| 50 h | 180000 s |
| 100 h | 360000 s |
FAQ
How many seconds are in a hour?
One hour = 3600 seconds.
How do I convert seconds back to hours?
Divide by 3600, or use the seconds to hours converter.