Convert seconds to hours
Converting seconds to hours is a common time task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 s equals 0.000277778 h, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert seconds to hours
To convert seconds to hours, multiply the number of seconds by 0.000277778. For example, 10 s × 0.000277778 = 0.00277778 h.
h = s × 0.000277778
- Write down the value in seconds you want to convert.
- Multiply it by 0.000277778 (the exact s→h factor).
- The result is your value in hours. Check it below with the converter or the table.
Conversion table
Common values of seconds and their equivalents in hours:
| s | h |
|---|---|
| 1 | 0.000277778 |
| 2 | 0.000555556 |
| 3 | 0.000833333 |
| 4 | 0.00111111 |
| 5 | 0.00138889 |
| 10 | 0.00277778 |
| 20 | 0.00555556 |
| 25 | 0.00694444 |
| 50 | 0.0138889 |
| 100 | 0.0277778 |
| 250 | 0.0694444 |
| 500 | 0.138889 |
About these units
Second (s). The second is the SI base unit of time, defined by the cesium-133 atomic transition frequency of 9,192,631,770 hertz. It is the foundation of all time measurement.
Hour (h). An hour equals 60 minutes or 3,600 seconds, dividing the day into 24 parts. Work schedules, travel times and billing are commonly expressed in hours.
Frequently asked questions
How do I convert seconds to hours?
To convert seconds to hours, multiply the number of seconds by 0.000277778. For example, 10 s × 0.000277778 = 0.00277778 h. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many hours are in 1 second?
1 s = 0.000277778 h. That is the fixed relationship used by this converter and by international standards.
How many seconds are in 1 hour?
1 h = 3,600 s. If you are converting in the opposite direction, use our Hour to Second converter for the dedicated table and FAQ.
Is the seconds to hours conversion exact?
Yes. Both units are defined by international agreement, so the factor of 0.000277778 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is second used for?
The second is the SI base unit of time, defined by the cesium-133 atomic transition frequency of 9,192,631,770 hertz. It is the foundation of all time measurement.