Convert Days to Seconds
1 day = 86,400 seconds. Type any value below to convert in either direction — the calculation happens in your browser.
Days to Seconds formula
Multiply the number of days by 86400 to get seconds.
seconds = days × 86400To go the other way: divide the number of seconds by 86400, or multiply by 0.00001157407.
days = seconds ÷ 86400Days to Seconds conversion table
| Days | Seconds |
|---|---|
| 1 d | 86,400 s |
| 2 d | 172,800 s |
| 3 d | 259,200 s |
| 4 d | 345,600 s |
| 5 d | 432,000 s |
| 6 d | 518,400 s |
| 7 d | 604,800 s |
| 8 d | 691,200 s |
| 9 d | 777,600 s |
| 10 d | 864,000 s |
| 15 d | 1,296,000 s |
| 20 d | 1,728,000 s |
| 25 d | 2,160,000 s |
| 30 d | 2,592,000 s |
| 40 d | 3,456,000 s |
| 50 d | 4,320,000 s |
| 75 d | 6,480,000 s |
| 100 d | 8,640,000 s |
| 250 d | 21,600,000 s |
| 500 d | 43,200,000 s |
| 1,000 d | 86,400,000 s |
Seconds to Days conversion table
| Seconds | Days |
|---|---|
| 1 s | 0.00001157407 d |
| 2 s | 0.00002314815 d |
| 3 s | 0.00003472222 d |
| 4 s | 0.0000462963 d |
| 5 s | 0.00005787037 d |
| 6 s | 0.00006944444 d |
| 7 s | 0.00008101852 d |
| 8 s | 0.00009259259 d |
| 9 s | 0.0001041667 d |
| 10 s | 0.0001157407 d |
About the day
A day is exactly 86,400 seconds by convention, ignoring leap seconds and slight variations in Earth’s rotation.
About the second
The second is the SI base unit of time, defined by the caesium-133 hyperfine transition frequency.
Frequently asked questions
How many seconds are in a day?
There are 86,400 seconds in one day.
How many days are in a second?
There are 0.00001157407 days in one second.
Is this conversion exact?
The ratio between the day and the second is fixed by definition, so the conversion is exact — the figures shown here are rounded for readability only.
What is 10 days in seconds?
10 days equals 864,000 seconds.