Day To Millisecond Conversion Chart

Day (d) Millisecond (ms)
1 d86400000 ms
2 d172800000 ms
5 d432000000 ms
10 d864000000 ms
20 d1728000000 ms
40 d3456000000 ms
80 d6912000000 ms
160 d13824000000 ms
320 d27648000000 ms
640 d55296000000 ms
1280 d110592000000 ms
2560 d221184000000 ms

Convert from day to millisecond formula

Total millisecond = Total day x 86400000

For example, if you want to convert 2 Day to Millisecond then,

2 d = 2 x 86400000 = 172800000 ms

Convert from millisecond to day formula

Total day =
Total millisecond
172800000 ms
= 2 d


The unit of measurement "day" is defined as 86,400 SI seconds and symbolized d. A day is usually 24 hours, plus or minus a possible leap second in Coordinated Universal Time (UTC), and occasionally plus or minus an hour in those locations that change from or to daylight saving time.


A millisecond (symbol: ms) is a thousandth of a second. A unit of 10 milliseconds may be called a centisecond, and one of 100 milliseconds a decisecond, but these names are rarely used.