1 Hour to Seconds

1 h = 3600 s

Calculation: s = 1 h × 3600 = 3600 s

Hour to Second Converter

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How long is 1 h?

1 hour (1.0 hours) is comparable to the length of a movie.

What does 1 h look like?

Illustration of a movie theater with screen
1 hour (1.0 hours) is comparable to the length of a movie.

Did you know? One hour is 3,600 s.

One hour = 3,600 seconds. The hour was originally 1/12 of the daylight period, so its length varied by season.

How to Convert Hour to Second

1 hour = 3600 seconds exact

Second = Hour × 3600

Example: 1 h × 3600 = 3600 s

Reverse Conversion

To convert seconds back to hours:

  • Remember, 1 second equals 0.000277778 hours.
  • To convert 3600 s to h, multiply 3600 x 0.000277778, resulting in 1 h.

exact This conversion factor is exact by international definition.

1 h is also equal to:

  • 60 minute
  • 0.041667 day
  • 0.0059524 week
  • 0.0013689 month (mean)
  • 0.00011408 year (mean)
About these units

Hour: h — The hour is a unit of time equal to exactly 3,600 seconds or 60 minutes. It is not an SI unit but is accepted for use with the SI system.

Second: s — The second is the SI base unit of time. Since 1967, it has been defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels...

Frequently Asked Questions

How much is 1 hour in seconds?

1 hour equals 3600 seconds. This is calculated by multiplying 1 by the conversion factor 3600.

What does 1 hour look like in seconds?

1 hour (3600 seconds) is one to four hours — a class, a movie, or a short flight.

How do you calculate 1 hour to seconds?

Multiply 1 by the conversion factor 3600. The calculation is 1 × 3600 = 3600 seconds. This factor is defined by international measurement standards.

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1 hour = 3600 seconds
1 hour = 3600 seconds — conversion chart

Nearby Conversions

2 hours7200 seconds 3 hours10800 seconds 4 hours14400 seconds 5 hours18000 seconds 6 hours21600 seconds 7 hours25200 seconds 8 hours28800 seconds 9 hours32400 seconds 10 hours36000 seconds 11 hours39600 seconds

For general conversions between hours and seconds, see the hours to seconds converter.

Also convert Hours to:

Conversion factors verified against NIST, BIPM, ISO 8601 Second defined by Cs-133 transition (SI, BIPM). Last reviewed: March 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.