Convert Hours to Seconds
One hour equals 3,600 seconds. Type any value to convert hours to seconds instantly — with a full reference table below.
Convert Hours to Seconds
🔒 Converted in your browser — nothing you enter is sent anywhere.
Conversion formula
To convert hours to seconds, multiply by 3,600. One hour equals 3,600 s, and one second equals 0.000278 hr.
Hours to Seconds table
About converting Hours to Seconds
Hours (hr) and Seconds (s) are both units of time. The exact factor is 1 hr = 3,600 s, so multiply by 3,600 to go from hours to seconds (or divide to go back).
The conversion is exact and runs entirely in your browser. Need the reverse? Use the Seconds to Hours converter, or the full unit converter for every unit at once.
Frequently asked questions
How many seconds are in one hour?
One hour equals 3,600 seconds.
How do I convert hours to seconds?
Multiply the number of hours by 3,600. For example, 10 hours = 36,000 seconds.
What is 5 hours in seconds?
5 hours is 18,000 seconds.