1 hour (h) = 3,600 seconds (s). To convert, multiply by 3,600: s = h × 3,600. For example, 5 h = 18,000 s.
s = h × 3,600
Hours to seconds table
| Hours (h) | Seconds (s) |
|---|---|
| 1 | 3,600 |
| 2 | 7,200 |
| 3 | 10,800 |
| 4 | 14,400 |
| 5 | 18,000 |
| 10 | 36,000 |
| 20 | 72,000 |
| 25 | 90,000 |
| 50 | 180,000 |
| 100 | 360,000 |
| 250 | 900,000 |
| 500 | 1,800,000 |
| 1,000 | 3,600,000 |
The two units
Hour (h). Sixty minutes.
Second (s). The SI unit of time, defined by the caesium-133 atom's hyperfine transition frequency.
Because both units are defined in terms of the same base unit, the factor 3,600 is exact, not a rounded measurement.
Convert hours to other units
- Hours to milliseconds — 1 h = 3,600,000 ms
- Hours to microseconds — 1 h = 3,600,000,000 µs
- Hours to nanoseconds — 1 h = 3,600,000,000,000 ns
- Hours to minutes — 1 h = 60 min
- Hours to days — 1 h = 0.0416666667 d
- Hours to weeks — 1 h = 0.005952381 wk
- Hours to years (365 days) — 1 h = 0.0001141553 yr
Convert other units to seconds
Questions people ask
- How many seconds are in a hour?
- 3,600, exactly.
- How do you convert hours to seconds?
- s = h × 3,600. It is the same as dividing by 0.0002777778.
- How do you convert seconds back to hours?
- h = s ÷ 3,600. See seconds to hours.
Results use the legal definitions of each unit and are checked against the Pint unit library. Display rounds to 10 significant digits. All unit conversions · More tools
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