Convert Days to Seconds
One day equals 86,400 seconds. Type any value to convert days to seconds instantly — with a full reference table below.
Convert Days to Seconds
Converted in your browser — nothing you enter is sent anywhere.
How to convert Days to Seconds
To convert days to seconds, multiply by 86,400. One day equals 86,400 s, and one second equals 0.0000115741 d.
- Take the value in days — for example 7.5 d.
- Multiply by 86,400 (the number of seconds in one day).
- 7.5 × 86,400 = 648,000 s.
Days to Seconds conversion table
| Days | Seconds |
|---|---|
| 1 d | 86,400 s |
| 2 d | 172,800 s |
| 3 d | 259,200 s |
| 5 d | 432,000 s |
| 10 d | 864,000 s |
| 15 d | 1,296,000 s |
| 20 d | 1,728,000 s |
| 30 d | 2,592,000 s |
| 45 d | 3,888,000 s |
| 60 d | 5,184,000 s |
| 90 d | 7,776,000 s |
| 120 d | 10,368,000 s |
| 365 d | 31,536,000 s |
| Seconds | Days |
|---|---|
| 1 s | 0.0000115741 d |
| 2 s | 0.0000231481 d |
| 3 s | 0.0000347222 d |
| 5 s | 0.0000578704 d |
| 10 s | 0.000115741 d |
| 15 s | 0.000173611 d |
| 20 s | 0.000231481 d |
| 30 s | 0.000347222 d |
| 45 s | 0.000520833 d |
| 60 s | 0.000694444 d |
| 90 s | 0.00104167 d |
| 120 s | 0.00138889 d |
| 365 s | 0.00422454 d |
About converting Days to Seconds
Days (d) and Seconds (s) are both units of time. The exact factor is 1 d = 86,400 s, so multiply by 86,400 to go from days to seconds (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Seconds to Days converter, or the full unit converter for every unit at once.
Real-world time in days and seconds
| Example | Days | Seconds |
|---|---|---|
| Sunlight's trip to Earth | ≈ 0.00577546 d | ≈ 499 s |
| A typical work day (8 h) | 0.333333 d | 28,800 s |
| A full-time work year (2,080 h) | 86.66667 d | 7,488,000 s |
| A common year (365 days) | 365 d | 31,536,000 s |
| A leap year (366 days) | 366 d | 31,622,400 s |
“≈” marks typical values; the rest are defined or measured figures.
The units
24 hours, 86,400 seconds (ignoring rare leap seconds).
Used for: Calendars and deadlines.
The SI base unit of time, defined by 9,192,631,770 oscillations of a caesium-133 atom.
Used for: Timing everything.
Seconds, minutes, hours, days and weeks are exact. Months and years are averages of the Gregorian calendar (a year of 365.2425 days, a month of 30.436875 days), because real months and years vary in length.