Hours to seconds (h to s)
Convert hours to seconds. For time, 1 h equals 3600 s.
Converter
h to s conversion table
| Hours | Seconds |
|---|---|
| 1 h | 3600 s |
| 2 h | 7200 s |
| 5 h | 18000 s |
| 10 h | 36000 s |
| 25 h | 90000 s |
| 50 h | 180000 s |
| 100 h | 360000 s |
| 1000 h | 3600000 s |
Formula
s = h × 3600
Worked example
25 h × 3600 = 90000 s
Popular conversion examples
Choose an example to open this converter with the value filled in. These are useful examples, not a claim about search rankings.
- 1 h to s = 3600 s
- 5 h to s = 18000 s
- 100 h to s = 360000 s
- 4 h to s = 14400 s
- 86400 s to h = 24 h
- 3600 s to h = 1 h
About hours and seconds
Hour (h)
An hour is 60 minutes, or 3,600 seconds. It is used for work time, travel time and speeds such as km/h.
Second (s)
The second is the SI base unit of time. It is used for timing, frequency and nearly every scientific time measurement.
Both are units of time; the base unit used internally is s.
Notes
- A day is taken as exactly 86,400 s and a week as 7 days. Leap seconds, daylight-saving changes and calendar months/years are ignored.
- Durations cannot be negative.
h to s FAQs
How do I convert hours to seconds?
Multiply the number of hours by 3600 to get seconds. For example, 25 h × 3600 = 90000 s.
How many seconds are in one hour?
1 h = 3600 s and 1 s = 0.0002777777778 h. To go the other way, use the seconds to hours converter.
How many seconds are in 2 hours?
2 h = 7200 s, rounded to 6 significant digits. Change the value in the converter above for any other amount.
How many seconds are in 3 hours?
3 h = 10800 s, rounded to 6 significant digits.
Is the h to s conversion exact?
Yes. The factor 3600 follows directly from the unit definitions (An hour is 60 minutes, or 3,600 seconds; the second is the SI base unit of time), so the only rounding is in the digits you choose to display.
What is the difference between hours and seconds?
An hour is 60 minutes, or 3,600 seconds. It is used for work time, travel time and speeds such as km/h. The second is the SI base unit of time. It is used for timing, frequency and nearly every scientific time measurement.
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