Convert Hours to Seconds

Enter the time in hours below to get the value converted to seconds.

SWAP UNITS
Results in Seconds:
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1 hr = 3,600 sec
Do you want to convert seconds to hours?

How to Convert Hours to Seconds

conversion scale showing hours and equivalent seconds time values

To convert a hour measurement to a second measurement, multiply the time by the conversion ratio. One hour is equal to 3,600 seconds, so use this simple formula to convert:

seconds = hours × 3,600

The time in seconds is equal to the hours multiplied by 3,600.

For example, here's how to convert 5 hours to seconds using the formula above.
5 hr = (5 × 3,600) = 18,000 sec

Hours and seconds are both units used to measure time. Keep reading to learn more about each unit of measure.

Hours

The hour is a period of time equal to 1/24 of a day or 60 minutes.

The hour is an SI accepted unit for time for use with the metric system. Hours can be abbreviated as hr, for example 1 hour can be written as 1 hr.

Seconds

The second has historically been defined as 1/60 of a minute or 1/86,400 of a day. The SI defines the second as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom.

The second is the SI base unit for time in the metric system. Seconds can be abbreviated as sec, for example 1 second can be written as 1 sec.

Hour Measurements and Equivalent Second Conversions

Common hour values converted to the equivalent second value
Hours Seconds
1 hr 3,600 sec
2 hr 7,200 sec
3 hr 10,800 sec
4 hr 14,400 sec
5 hr 18,000 sec
6 hr 21,600 sec
7 hr 25,200 sec
8 hr 28,800 sec
9 hr 32,400 sec
10 hr 36,000 sec
11 hr 39,600 sec
12 hr 43,200 sec
13 hr 46,800 sec
14 hr 50,400 sec
15 hr 54,000 sec
16 hr 57,600 sec
17 hr 61,200 sec
18 hr 64,800 sec
19 hr 68,400 sec
20 hr 72,000 sec
21 hr 75,600 sec
22 hr 79,200 sec
23 hr 82,800 sec
24 hr 86,400 sec
25 hr 90,000 sec
26 hr 93,600 sec
27 hr 97,200 sec
28 hr 100,800 sec
29 hr 104,400 sec
30 hr 108,000 sec
31 hr 111,600 sec
32 hr 115,200 sec
33 hr 118,800 sec
34 hr 122,400 sec
35 hr 126,000 sec
36 hr 129,600 sec
37 hr 133,200 sec
38 hr 136,800 sec
39 hr 140,400 sec
40 hr 144,000 sec

More Hour Time Conversions

Convert to Centuries
1 hr is equal to 1.1408E-6 centuries
Convert to Decades
1 hr is equal to 1.1408E-5 decades
Convert to Years
1 hr is equal to 0.000114 years
Convert to Months
1 hr is equal to 0.001369 months
Convert to Weeks
1 hr is equal to 0.005952 weeks
Convert to Days
1 hr is equal to 0.041667 days
Convert to Minutes
1 hr is equal to 60 minutes
Convert to Milliseconds
1 hr is equal to 3,600,000 milliseconds
Convert to Microseconds
1 hr is equal to 3,600,000,000 microseconds
Convert to Nanoseconds
1 hr is equal to 3,600,000,000,000 nanoseconds