Convert hours to seconds
1 hour equals 3,600 seconds. Enter a value below to convert instantly.
Need the other direction? Convert second to hour →
Formula
Multiply the number of hours by 3600 to get seconds.
Step by step
- Start with 1 h.
- Multiply by the conversion factor 3600.
- 1 × 3600 = 3,600 s.
Hours to Seconds conversion table
| Hours (h) | Seconds (s) |
|---|---|
| 1 | 3,600 |
| 2 | 7,200 |
| 5 | 18,000 |
| 10 | 36,000 |
| 30 | 108,000 |
| 60 | 216,000 |
| 100 | 360,000 |
| 500 | 1,800,000 |
| 1,000 | 3,600,000 |
Convert Hour to other time units
1 h expressed in every other time unit on this site.
- Second s 3,600
- Millisecond ms 3,600,000
- Microsecond µs 3,600,000,000
- Nanosecond ns 3,600,000,000,000
- Picosecond ps 3.6e+15
- Femtosecond fs 3.6e+18
- Attosecond as 3.6e+21
- Shake shake 360,000,000,000
- Planck Time tP 6.6774904e+46
- Minute min 60
- Hour h 1
- Day d 0.041666667
- Week wk 0.005952381
- Fortnight fortnight 0.0029761905
- Month mo 0.0013689535
- Quarter qtr 0.00045631783
- Year yr 0.00011407946
- Decade decade 0.000011407946
- Century century 0.0000011407946
- Millennium millennium 1.1407946e-7
- Day (sidereal) d (sid) 0.041780746
- Hour (sidereal) h (sid) 1.0027379
- Minute (sidereal) min (sid) 60.164275
- Second (sidereal) s (sid) 3,609.8565
- Week (Julian) wk (Jul) 0.005952381
- Month (synodic) mo (syn) 0.0014109658
- Year (Julian) yr (Jul) 0.00011407712
- Year (leap) yr (leap) 0.00011384335
- Year (tropical) yr (trop) 0.00011407954
- Year (sidereal) yr (sid) 0.00011407513
- Year (common) yr (365d) 0.00011415525
- Quinquennial 5 yr 0.00002283105
- Septennial 7 yr 0.000016307893
- Octennial 8 yr 0.000014269406
- Novennial 9 yr 0.000012683917
- Quindecennial 15 yr 0.0000076103501
About the hour
The hour (h) is a Other unit of time.
About the second
The second (s) is a SI unit of time. The SI base unit of time, defined by the caesium-133 hyperfine transition.
Where this conversion is used
Converting hours to seconds comes up when scheduling, timers, project planning, and physics. Month and year use average calendar lengths, so they are approximate for any specific date range.
Related conversions
Frequently asked questions
How many seconds are in a hour?
One hour equals 3,600 seconds.
How do you convert hours to seconds?
Multiply the number of hours by 3600 to get seconds.
What is 1 second in hours?
One second equals 0.00027777778 hours.
When would I convert hours to seconds?
This conversion is common when scheduling, timers, project planning, and physics.
Conversion factors are based on internationally agreed unit definitions. See our methodology and sources for details on how these values are verified.