Convert Hours to Milliseconds

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

SWAP UNITS
Results in Milliseconds:
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1 hr = 3,600,000 ms

How to Convert Hours to Milliseconds

Calendars document the days in a month

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.

Milliseconds

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

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 Seconds
1 hr is equal to 3,600 seconds
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