Convert Days to Seconds

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

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Results in Seconds:
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1 day = 86,400 sec

How to Convert Days to Seconds

Calendars document the days in a month

Convert days to seconds with this simple formula:

seconds = days × 86,400

Converting a day time measurement to a second measurement involves multiplying the time by the conversion ratio to find the result. One day is equal to 86,400 seconds, so to convert simply multiply by 86,400.

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

Days and seconds are both units used to measure time. Learn more about time and find more time measurement conversion calculators. Days are a time measurement and can be abbreviated as day, for example 1 day. Seconds are a time measurement and can be abbreviated as sec, for example 1 sec.

days and seconds are units used to measure time
Convert Seconds to Days

Day Measurements and Equivalent Second Conversions

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

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 Milliseconds
1 day is equal to 86,400,000 milliseconds
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

Unit of Measurement Conversion Made Easy!

There are thousands of units of measure in use across the globe, and converting from one to another can be very difficult since each conversion requires a different formula to derive the result. Our unit of measurement conversion tools are meant to be dead easy. We break the mold of the typical dry and complicated experience. In addition to converting from one measurement to another, we provide the formula so you can see how the conversion is done, use it on you’re own calculator if you need to!

Convert units of length, weight, volume, and area between imperial and metric measures

Understanding the Metric System

The metric system makes it relatively easy to convert from one metric unit to another metric unit. The metric system uses a base unit, think meters or grams, and a prefix such as kilo or milli. The prefixes differ from the base units by differing powers of 10. So to convert within the metric system it’s usually a matter of multiplying or dividing by one of the powers of 10.

Here is a list of some of the common metric prefixes:

  • “kilo” – 1,000x larger
  • “hecto” – 100x larger
  • “deca” – 10x larger
  • “deci” – 10x smaller
  • “centi” – 100x smaller
  • “milli” – 1,000x smaller

There is a helpful mnemonic for remembering the prefixes: “King Henry Died Until Drinking Chocolate Milk.”
The u in Until refers to the base unit.