Hours to Seconds Converter
One Hour equals 3600 Seconds (1 h = 3600 s). Multiply an Hour value by 3600 to get the equivalent in Seconds. Enter your value in the calculator above. The formula and examples below show how to calculate it by hand.
Formula
s = h × 3600
Multiply the Hour value by 3600 to get the equivalent value in Seconds.
Example Conversions
1 Hour (h)
3600 Second (s)
5 Hour (h)
18000 Second (s)
10 Hour (h)
36000 Second (s)
25 Hour (h)
90000 Second (s)
100 Hour (h)
360000 Second (s)
Conversion Table
| Hour (h) | Second (s) |
|---|---|
| 0.1 | 360 |
| 0.5 | 1800 |
| 1 | 3600 |
| 2 | 7200 |
| 5 | 18000 |
| 10 | 36000 |
| 25 | 90000 |
| 50 | 180000 |
| 100 | 360000 |
| 250 | 900000 |
| 500 | 1800000 |
| 1000 | 3600000 |
How to Convert Manually
Use these steps to convert Hour values to Second without the calculator.
- Write down the value in Hour (h) that you want to convert.
- Multiply that value by 3600.
- For example, 10 Hours × 3600 = 36000 Seconds.
- Label the result as Second (s).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Hour and one Second.
About Hour and Second
The hour is 3,600 seconds (60 minutes). Work shifts, travel durations, and hourly wages are stated in hours. The second is the SI base unit of time, defined by 9,192,631,770 oscillations of the cesium-133 atom. Every other time unit is a multiple or fraction of it. One Hour equals 3600 Seconds (1 h = 3600 s). Hour is used in work hours and wages and in flight and travel durations. Second is used in scientific measurement.
Precision and Rounding:Units up to the week are exact; months, years, decades, and centuries are calendar averages (this converter uses a 365-day year and a month of one twelfth of that), so converted values are approximations for scheduling, not for date arithmetic. Use a calendar library when exact dates matter.
SI time units follow the BIPM SI Brochure; month and year conversions use the documented average calendar values shown on this site (reference).
Worked Example
15Hours equals54000Seconds.
15 h × 3600 = 54000 s
FAQ
How do I convert Hour to Second?
Multiply the Hour value by 3600 to get the equivalent value in Seconds.
What is the formula for Hour to Second?
The formula is s = h × 3600.
How many Seconds are in 1 Hour?
1 Hour equals 3600 Seconds.
Can I convert Second back to Hour?
Yes. 1 Second equals 0.0002777777778 Hours, and the related converter can reverse the calculation.
What are common names for Hour and Second?
Hour is shown as h and may also be searched as hours, hr, hrs. Second is shown as s and may also be searched as seconds, sec, secs.
Was this page helpful?
Let us know if this converter met your needs.