Convert day to second
Please provide values below to convert day [d] to second [s], or Convert second to day.
1 d = 86400 s. To convert day to second, multiply the value by 86400; to go the other way, divide by it (1 s = 1.15740740741e-05 d). Both units measure time and appear in everyday as well as technical calculations, so switching between them quickly is often useful.
Quick Reference
- 1 d = 86400 s
- 1 s = 1.15740740741e-05 d
- 10 d = 864000 s
- 100 d = 8640000 s
How to Convert Day to Second
1 d = 86400 s
Example: convert 15 d to s:
15 d = 15 × 86400 s = 1296000 s
Day to Second Conversion Table
| day | second |
|---|---|
| 1 d | 86400 s |
| 2 d | 172800 s |
| 3 d | 259200 s |
| 5 d | 432000 s |
| 10 d | 864000 s |
| 20 d | 1728000 s |
| 50 d | 4320000 s |
| 100 d | 8640000 s |
| 500 d | 43200000 s |
| 1000 d | 86400000 s |
Day
A day is a unit of time representing the period of one complete rotation of the Earth on its axis, typically lasting 24 hours.
History/Origin
The concept of a day has origins in ancient civilizations observing the cycle of day and night. The 24-hour day was standardized in the modern era, with the division into hours dating back to ancient Egypt and further refined through the adoption of mechanical clocks.
Current Use
The day is used universally to measure time intervals, schedule activities, and organize daily life, with the 24-hour system being the standard in most countries worldwide.
Second
The second (symbol: s) is the base unit of time in the International System of Units (SI), used to measure durations and intervals.
History/Origin
The second was originally defined as 1/86400 of a mean solar day. It was later redefined in 1967 based on atomic properties, specifically as the duration of 9,192,631,770 periods of radiation corresponding to the transition between two hyperfine levels of the cesium-133 atom.
Current Use
The second is universally used in science, technology, and everyday life to quantify time intervals, synchronize clocks, and coordinate activities across various fields.
Frequently Asked Questions
What is 1 day in second?
1 day (d) = 86400 second (s).
How do you convert day to second?
Multiply the day value by 86400. For example, 25 d × 86400 = 2160000 s.
What is 10 day in second?
10 d = 864000 s.
Which unit is larger, the day or the second?
The day is the larger unit: 1 d = 86400 s.