How many seconds are in 1 hours?

1 hours (h) is exactly 3,600.00 seconds (s).

How do I convert hours to seconds?

Multiply the value in hours by 3,600.00 to get the result in seconds. Or use the converter above — type any number and see the result instantly.

Hours (h) to Seconds (s) Conversion

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Hours

The hour is a unit of time equal to exactly 3,600 seconds (60 minutes), deriving from the ancient Egyptian division of the day into 24 equal parts. In science, hours are commonly used for expressing reaction rates, half-lives of radioactive isotopes, pharmacokinetic parameters, and electrical energy consumption (kilowatt-hours).

Seconds

The second is the SI base unit of time, defined since 1967 as the duration of exactly 9,192,631,770 cycles of radiation from the caesium-133 atom. Atomic clocks based on this definition lose less than one second in 300 million years. The second underpins all timekeeping in modern civilisation — from GPS satellite synchronisation to internet protocols and financial transaction timestamps.

Hours (h) to Seconds (s) - Conversion Table
Hours (h)	Seconds (s)
0.1 h	360 s
1 h	3600 s
2 h	7200 s
3 h	10800 s
5 h	18000 s
10 h	36000 s
20 h	72000 s
30 h	108000 s
50 h	180000 s
100 h	360000 s
1000 h	3600000 s

Convert Hours (h) to other units of Time

List of Conversions
‣ Hours (h) to nanoseconds (ns)
‣ Hours (h) to microseconds (μs)
‣ Hours (h) to milliseconds (ms)
‣ Hours (h) to seconds (s)
‣ Hours (h) to minutes (min)
‣ Hours (h) to days (d)
‣ Hours (h) to weeks (wk)
‣ Hours (h) to fortnights (fn)
‣ Hours (h) to months (mo)
‣ Hours (h) to years (yr)
‣ Hours (h) to decades (dec)
‣ Hours (h) to centuries (c.)
‣ Hours (h) to millennia (mil.)