Convert Days to Seconds
1 d = 86400 s
Conversion Table
| days (d) | seconds (s) |
|---|---|
| 0.5 | 43200 |
| 1 | 86400 |
| 2 | 172800 |
| 5 | 432000 |
| 10 | 864000 |
| 25 | 2160000 |
| 50 | 4320000 |
| 100 | 8640000 |
| 250 | 21600000 |
| 500 | 43200000 |
| 1000 | 86400000 |
How to Convert days to seconds
To convert days to seconds, multiply the value by the conversion factor:
For example: 10 d = 864000 s
Related Converters
About days and seconds
The Conversion Formula
To convert days to seconds, multiply the value by the conversion factor: 1 d = 86400 s. For a worked example, suppose you need to convert 25 d to seconds: 25 × 86400 = 2160000 s. To convert in the opposite direction, divide by 86400, or equivalently multiply by 0.0000115741.
About days
A day is the time it takes for Earth to complete one rotation. While a 'solar day' varies slightly, our civil day is fixed at exactly 24 hours or 86,400 seconds. It is the fundamental cycle of human life. days are commonly used in Calendar planning, Hotel stays, Shipping times, and Subscription trials, Vacation length.
Earth spins once on its axis in one day.
About seconds
The second is the fundamental unit of time in the International System of Units (SI). Originally defined as 1/86,400 of a mean solar day, it is now defined with extreme precision by the radiation frequency of the cesium-133 atom. This 'atomic time' allows GPS satellites and the internet to function synchronously. seconds are commonly used in Sports timing, Scientific experiments, Cooking timers, and Internet protocols, Heart rate measurement.
A healthy resting heart beats roughly once per second.
When Would You Convert days to seconds?
Converting between days and seconds is one of the most common time conversions. You might need this conversion when working with international specifications, following instructions written for a different measurement system, or comparing values across different standards. Having the conversion factor (1 d = 86400 s) memorized or bookmarked can save time in professional and everyday contexts alike.