Hours to Seconds – hour to second Converter
1 h = 3600 s
Formula
s = h × 3600
Hours to seconds conversion table
| hours (h) | seconds (s) |
|---|---|
| 0.25 h | 900 s |
| 0.5 h | 1800 s |
| 1 h | 3600 s |
| 2 h | 7200 s |
| 5 h | 18000 s |
| 10 h | 36000 s |
| 20 h | 72000 s |
| 50 h | 180000 s |
| 100 h | 360000 s |
| 200 h | 720000 s |
| 500 h | 1800000 s |
| 1000 h | 3600000 s |
| 2500 h | 9000000 s |
| 5000 h | 18000000 s |
| 10000 h | 36000000 s |
Hours and seconds are both time units. One hour equals 3600 seconds; enter any value above for an instant result, or use the table for common conversions.
Sanity-check examples
1 h = 3600 s10 h = 36000 s2.5 h = 9000 s
Common pitfalls and look-alike units
Seconds through weeks are fixed lengths; months and years are not a fixed number of seconds, so this converter stops at weeks. Common averages: 1 year ≈ 365.2425 days (Gregorian), 1 month ≈ 30.44 days — for exact schedules or interest, count actual dates instead.
Frequently asked questions
How many seconds are in a hour?
1 hour (h) equals 3600 second (s).
How do I convert hours to seconds?
Multiply the hour value by 3600 to get second — for example, 2 hours = 7200 second.
How do I convert seconds back to hours?
1 second is approximately 0.000277778 hour. Use the swap button or the reverse conversion page linked on this page.