Hour to Second Converter
Convert hours to seconds with this free time converter. The exact relationship used on this page is 1 hour = 3600 seconds. Type any number — the result updates instantly, works on phones and desktops, and is ready to copy into homework, a spec sheet, or a shopping list.
Formula: Second = Hour × 3600
How to convert hours to seconds
- Enter the value in hours in the converter.
- Read the equivalent amount in seconds.
- Use the swap link if you need second to hour instead.
- Check the table for common values without typing.
Worked examples
- 1 h = 3,600 s
- 5 h = 18,000 s
- 10 h = 36,000 s
- 25 h = 90,000 s
Conversion table
Common hours values converted to seconds.
| h | s |
|---|---|
| 1 | 3,600 |
| 2 | 7,200 |
| 3 | 10,800 |
| 4 | 14,400 |
| 5 | 18,000 |
| 6 | 21,600 |
| 7 | 25,200 |
| 8 | 28,800 |
| 9 | 32,400 |
| 10 | 36,000 |
| 20 | 72,000 |
| 50 | 180,000 |
| 100 | 360,000 |
| 250 | 900,000 |
| 500 | 1,800,000 |
| 1,000 | 3,600,000 |
About this conversion
Hour (h) and Second (s) are both time units. Time converters turn seconds into hours, hours into days, and days into years using standard mean values (365. Bookmark this URL when you convert hours to seconds often, then explore related pairs in the same category if you need a different target unit.
Need the other direction? Open the second to hour converter.
FAQ
How many seconds are in 1 hour?+
1 hour equals 3600 seconds.
What is the formula to convert hours to seconds?+
Second = Hour × 3600
How do I convert hours to seconds by hand?+
Multiply the hour value by 3600. Example: 10 hours × 3600 = 36000 seconds.
Is this h to s converter accurate?+
Yes. Linear conversions use internationally agreed factors relative to SI. Temperature and inverse fuel units use the standard offset or reciprocal formulas, not a guessed scale factor.