Convert Hours to Milliseconds

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

Results in Milliseconds:

1 hr = 3,600,000 ms

Do you want to convert milliseconds to hours?

How to Convert Hours to Milliseconds

To convert a hour measurement to a millisecond measurement, multiply the time by the conversion ratio. One hour is equal to 3,600,000 milliseconds, so use this simple formula to convert:

milliseconds = hours × 3,600,000

The time in milliseconds is equal to the hours multiplied by 3,600,000.

For example, here's how to convert 5 hours to milliseconds using the formula above.

5 hr = (5 × 3,600,000) = 18,000,000 ms

Hours and milliseconds 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.

The millisecond is a multiple of the second, which is the SI base unit for time. In the metric system, "milli" is the prefix for 10^-3. Milliseconds can be abbreviated as ms, for example 1 millisecond can be written as 1 ms.

Hour Measurements and Equivalent Millisecond Conversions

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