Convert days to seconds
1 d = 86400 s — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
86 400s
Exact decimal: 86400
1 d = 86400 s
How to convert days to seconds
Multiply the number of days by 86400 to get seconds.
The exact factor is 86400 .
Day: The mean solar day of exactly 86 400 SI seconds; the real Earth wobbles.
Day to Second conversion table
| Days (d) | Seconds (s) |
|---|---|
| 1 d | 86 400 |
| 2 d | 172 800 |
| 3 d | 259 200 |
| 5 d | 432 000 |
| 10 d | 864 000 |
| 20 d | 1 728 000 |
| 25 d | 2 160 000 |
| 50 d | 4 320 000 |
| 100 d | 8 640 000 |
| 250 d | 21 600 000 |
| 500 d | 43 200 000 |
| 1000 d | 86 400 000 |
Second to Day conversion table
| Seconds (s) | Days (d) |
|---|---|
| 1 s | 0.000 011 574 074 |
| 2 s | 0.000 023 148 148 |
| 3 s | 0.000 034 722 222 |
| 5 s | 0.000 057 870 37 |
| 10 s | 0.000 115 740 74 |
| 20 s | 0.000 231 481 48 |
| 25 s | 0.000 289 351 85 |
| 50 s | 0.000 578 703 7 |
| 100 s | 0.001 157 407 4 |
| 250 s | 0.002 893 518 5 |
| 500 s | 0.005 787 037 |
| 1000 s | 0.011 574 074 |
Frequently asked
How many seconds are in a day?
One day equals 86400 seconds (d → s). That figure is exact, not rounded.
How do you convert days to seconds?
Multiply the number of days by 86400 to get seconds.
What is 1 s in days?
One second is 0.00001157407407 days.
What is 10 d in s?
10 d = 864 000 s.
What exactly is a day?
The mean solar day of exactly 86 400 SI seconds; the real Earth wobbles.