Hours to Seconds ConverterRight in Your Browser
Convert hours (h) to seconds (s). The hour (h) is 60 minutes — the unit of workdays, flights and billing. The second (s) is the SI base unit of time, defined by the vibration of the cesium atom since 1967. Everything is calculated locally in your browser — no server, and it works offline.
3600 s
in seconds (second)
To convert hours to seconds, multiply the hour value by 3600.
Switch to Seconds to HoursHours to Seconds Chart
| Hours (h) | Seconds (s) |
|---|---|
| 1 | 3600 |
| 2 | 7200 |
| 3 | 10800 |
| 4 | 14400 |
| 5 | 18000 |
| 10 | 36000 |
| 20 | 72000 |
| 50 | 180000 |
| 100 | 360000 |
Frequently Asked Questions
How many seconds are in a hour?
One hour equals 3600 seconds (1 h = 3600 s). So to go from hours to seconds, multiply the hour value by 3600.
What is the formula to convert hours to seconds?
To convert hours to seconds, multiply the hour value by 3600. For example, 10 h is 36000 s.
What is 8 hours in seconds?
8 hours — a standard workday — is 28800 seconds. The converter above works for any value, entirely in your browser.
Is the hour to second conversion exact?
The factor used here is the defined value: 1 h = 3600 s. Results are rounded to six significant digits for readability, so for high-precision work use the full factor.
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