Convert Days to Seconds
d to s · time conversion
What are days and seconds?
A day is 24 hours, the time for Earth to rotate once on its axis. The second is the SI base unit of time, defined by the vibration of a cesium atom. For reference: there are 86,400 seconds in a day and 604,800 in a week.
How to convert days to seconds
1 d = 86,400 s. To convert, multiply the number of days by 86,400. For example, 5 d = 432,000 s, and 20 d = 1,728,000 s. To go the other way, multiply seconds by 0.0000115741 (since 1 s = 0.0000115741 d).
Days to Seconds conversion table
| Days (d) | Seconds (s) |
|---|---|
| 1 | 86,400 |
| 5 | 432,000 |
| 10 | 864,000 |
| 30 | 2,592,000 |
| 60 | 5,184,000 |
| 90 | 7,776,000 |
| 365 | 31,536,000 |
FAQ
What is 1 d in s?
1 d = 86,400 s. To convert any amount, multiply the number of days by 86,400.
How do I convert seconds back to days?
Go the other way: 1 s = 0.0000115741 d, so multiply seconds by 0.0000115741 to get days.
Is a day bigger than a second?
Yes — 1 d is the larger unit, equal to 86,400 s.
Are these time conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.