Convert Days to Milliseconds

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

SWAP UNITS
Results in Milliseconds:
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1 day = 86,400,000 ms

How to Convert Days to Milliseconds

Calendars document the days in a month

To convert a day measurement to a millisecond measurement, multiply the time by the conversion ratio. One day is equal to 86,400,000 milliseconds, so use this simple formula to convert:

milliseconds = days × 86,400,000

The time in milliseconds is equal to the days multiplied by 86,400,000.

For example, here's how to convert 5 days to milliseconds using the formula above.
5 day = (5 × 86,400,000) = 432,000,000 ms

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

Days

One day is the time it takes for the Earth to complete a single rotation around its axis in relation to the Sun. There are 24 hours in a day.

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

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.

Day Measurements and Equivalent Millisecond Conversions

Common day values converted to the equivalent millisecond value
Days Milliseconds
1 day 86,400,000 ms
2 day 172,800,000 ms
3 day 259,200,000 ms
4 day 345,600,000 ms
5 day 432,000,000 ms
6 day 518,400,000 ms
7 day 604,800,000 ms
8 day 691,200,000 ms
9 day 777,600,000 ms
10 day 864,000,000 ms
11 day 950,400,000 ms
12 day 1,036,800,000 ms
13 day 1,123,200,000 ms
14 day 1,209,600,000 ms
15 day 1,296,000,000 ms
16 day 1,382,400,000 ms
17 day 1,468,800,000 ms
18 day 1,555,200,000 ms
19 day 1,641,600,000 ms
20 day 1,728,000,000 ms
21 day 1,814,400,000 ms
22 day 1,900,800,000 ms
23 day 1,987,200,000 ms
24 day 2,073,600,000 ms
25 day 2,160,000,000 ms
26 day 2,246,400,000 ms
27 day 2,332,800,000 ms
28 day 2,419,200,000 ms
29 day 2,505,600,000 ms
30 day 2,592,000,000 ms
31 day 2,678,400,000 ms
32 day 2,764,800,000 ms
33 day 2,851,200,000 ms
34 day 2,937,600,000 ms
35 day 3,024,000,000 ms
36 day 3,110,400,000 ms
37 day 3,196,800,000 ms
38 day 3,283,200,000 ms
39 day 3,369,600,000 ms
40 day 3,456,000,000 ms

More Day Time Conversions

Convert to Centuries
1 day is equal to 2.7379E-5 centuries
Convert to Decades
1 day is equal to 0.000274 decades
Convert to Years
1 day is equal to 0.002738 years
Convert to Months
1 day is equal to 0.032855 months
Convert to Weeks
1 day is equal to 0.142857 weeks
Convert to Hours
1 day is equal to 24 hours
Convert to Minutes
1 day is equal to 1,440 minutes
Convert to Seconds
1 day is equal to 86,400 seconds
Convert to Microseconds
1 day is equal to 86,400,000,000 microseconds
Convert to Nanoseconds
1 day is equal to 86,400,000,000,000 nanoseconds