Day To Second Conversion Chart

Day (d) Second (s)
1 d86400 s
2 d172800 s
5 d432000 s
10 d864000 s
20 d1728000 s
40 d3456000 s
80 d6912000 s
160 d13824000 s
320 d27648000 s
640 d55296000 s
1280 d110592000 s
2560 d221184000 s

Convert from day to second formula

Total second = Total day x 86400

For example, if you want to convert 5 Day to Second then,

5 d = 5 x 86400 = 432000 s

Convert from second to day formula

Total day =
Total second
432000 s
= 5 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.


The second (symbol: s) is the base unit of time in SI, multiples of seconds are usually counted in hours and minutes. Fractions of a second are usually counted in tenths or hundredths.