Hours to Seconds
2 hours is 7200 seconds, because each hour holds 3600 seconds and 2 times 3600 is 7200. To convert hours to seconds, multiply the hours by 3600. The Second format returns any duration as a single second count, so 1.5 hours reads as 5400 Seconds.
Countdown timers, video encoders, and cron settings usually want raw seconds while you think in hours. Multiply the hours by 3600 to convert. A 2-hour timer counts down 7200 seconds; a 45-minute session, entered as 0.75 hours, runs 2700 seconds.
FormulaMultiply the number of hours by 3600 to get total seconds: 2 hours × 3600 = 7200 seconds, and 2.5 hours × 3600 = 9000 seconds.
Convert hours to seconds
Type hours, minutes, days, weeks, months, years, or seconds, as full words or shorthand (h m d w), with + - * /. Pick how the answer reads with Show result as up top. It all runs in your browser. Drag the card’s right edge to make it wider.
Hours to Seconds conversion table
| Hours | Seconds |
|---|---|
| 0.5 Hours | 1800 Seconds |
| 1 Hour | 3600 Seconds |
| 1.5 Hours | 5400 Seconds |
| 2 Hours | 7200 Seconds |
| 3 Hours | 10800 Seconds |
| 4 Hours | 14400 Seconds |
| 6 Hours | 21600 Seconds |
| 8 Hours | 28800 Seconds |
| 12 Hours | 43200 Seconds |
| 24 Hours | 86400 Seconds |
Common questions
How many seconds are in 1 hour?
One hour is 3600 seconds. An hour has 60 minutes, each minute has 60 seconds, and 60 × 60 = 3600. That constant sits behind every row in the table above.
How many seconds is an 8-hour workday?
8 hours is 28800 seconds, since 8 × 3600 = 28800. A full 24-hour day comes to 86400 seconds, which is why Unix timestamps advance by 86400 between one midnight and the next.
How do I convert a fractional value like 1.5 hours?
Multiply by 3600 the same way. 1.5 × 3600 = 5400 seconds: 3600 from the full hour plus 1800 from the half. Any decimal carries straight through the multiplication.