Convert days to seconds
1 d = 86,400 s. Change the amount below, or read the formula and the reference table further down.
1 day equals
seconds
1 d = 86,400 s
The formula
Days and seconds both measure time from the same zero, so a single multiplier does the job.
s = d × 86,400
Going the other way? Convert seconds to days.
Days to seconds table
Common values, rounded for reading.
| Days (d) | Seconds (s) |
|---|---|
| 1 | 86,400 |
| 2 | 172,800 |
| 3 | 259,200 |
| 4 | 345,600 |
| 5 | 432,000 |
| 6 | 518,400 |
| 7 | 604,800 |
| 8 | 691,200 |
| 9 | 777,600 |
| 10 | 864,000 |
| 15 | 1,296,000 |
| 20 | 1,728,000 |
| 25 | 2,160,000 |
| 30 | 2,592,000 |
| 40 | 3,456,000 |
| 50 | 4,320,000 |
| 75 | 6,480,000 |
| 100 | 8,640,000 |
| 250 | 21,600,000 |
| 500 | 43,200,000 |
| 1,000 | 86,400,000 |
Questions people ask
- How many seconds are in a day?
- One day equals 86,400 seconds.
- How do I convert days to seconds by hand?
- Multiply the number of days by 86,400. For a rough check, 86,400 is close enough for most everyday use.
- What is 1 day in seconds?
- 1 day is 86,400 seconds.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.