How to convert hours to seconds
To convert hours (h) to seconds (s), multiply the value in hours by 3,600.
s = h × 3,600
Example: 5 h = 18,000 s.
You can also type 5 h to s into the smart calculator, or mix units: 1 h + 1 s.
Hours to Seconds conversion table
| Hours | Seconds |
|---|---|
| 0.01 h | 36 s |
| 0.1 h | 360 s |
| 0.25 h | 900 s |
| 0.5 h | 1,800 s |
| 1 h | 3,600 s |
| 2 h | 7,200 s |
| 3 h | 10,800 s |
| 4 h | 14,400 s |
| 5 h | 18,000 s |
| 6 h | 21,600 s |
| 7 h | 25,200 s |
| 8 h | 28,800 s |
| 9 h | 32,400 s |
| 10 h | 36,000 s |
| 12 h | 43,200 s |
| 15 h | 54,000 s |
| 20 h | 72,000 s |
| 25 h | 90,000 s |
| 30 h | 108,000 s |
| 40 h | 144,000 s |
| 50 h | 180,000 s |
| 60 h | 216,000 s |
| 75 h | 270,000 s |
| 100 h | 360,000 s |
| 250 h | 900,000 s |
| 500 h | 1,800,000 s |
| 1,000 h | 3,600,000 s |
Converting seconds back to hours
1 s = 0.0002777777778 h. See the Seconds to Hours converter, or press the swap button above.
About the units
Hour (h)
Sixty minutes, or 3,600 seconds.
Second (s)
The SI base unit of time, defined by 9,192,631,770 cycles of the caesium-133 hyperfine transition.
The second is the SI base unit of time, defined by the caesium-133 atom. Months and years vary in length, so this converter uses Gregorian averages: a year of 365.2425 days and a month of 30.436875 days. For exact calendar spans between two dates, use the date calculator.
Questions and answers
How many seconds are in a hour?
One hour (h) equals 3,600 seconds (s).
How do I convert hours to seconds?
To convert hours to seconds, multiply the value in hours by 3,600. The formula is s = h × 3,600. For example, 5 h = 18,000 s.
What is 5 h in s?
5 hours is 18,000 seconds.
Which is bigger, a hour or a second?
A hour is bigger: 1 h = 3,600 s.
How long is a month in this converter?
Months and years change length, so unit conversion uses Gregorian averages: a year of 365.2425 days and a month of 30.436875 days. For exact spans between two calendar dates, use the date calculator.
Does this h to s converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.