100% free · No sign-up · Runs in your browser
Convert hours to seconds
Instant, accurate h → s conversion with a live converter, table and formula.
=
1 hour = 3600 seconds
1 second = 0.000277778 hours
hours to seconds table
| hours (h) | seconds (s) |
|---|---|
| 0.5 | 1800 |
| 1 | 3600 |
| 2 | 7200 |
| 5 | 18000 |
| 10 | 36000 |
| 20 | 72000 |
| 50 | 180000 |
| 100 | 360000 |
| 500 | 1800000 |
| 1000 | 3600000 |
Formula
seconds = hours × 3600.
Example
10 hours = 36000 seconds.
What is a hour?
An hour (h) is 60 minutes, or 3,600 seconds.
What is a second?
The second (s) is the SI base unit of time.
Real-world reference points
A workday is 8 hours; a week 168 hours; a year roughly 8,766 hours.
| Reference | hours | seconds |
|---|---|---|
| Feature film | 2 h | 7,200 s |
| Workday (8 h) | 8 h | 28,800 s |
| Day | 24 h | 86,400 s |
| Week | 168 h | 605,000 s |
| Average month | 731 h | 2,630,000 s |
Mistakes to avoid with time conversions
- Treating every month as 30 days — the average is ~30.44, and finance often uses exact day counts.
- Calling a year exactly 52 weeks — it's 52 weeks plus 1-2 days, which shifts weekday math.
- Ignoring time zones and DST when converting durations across calendar boundaries.
Frequently asked questions
How many seconds in a hours?+
1 hour = 3600 seconds.
How do I convert hours to seconds?+
Enter the value in the hours box above and the seconds value appears instantly. You can also type in the seconds box to convert the other way.
Is this h to s converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.