1 s = 1.15741 × 10d
1 d = 86,400 s
Second
Definition: The second (symbol: s) is the SI base unit of time. It is defined as the duration of 9,192,632,770 periods of radiation from the transition between two hyperfine levels of the ground state of a caesium-133 atom. This modern atomic definition ensures extreme accuracy.
Origin:
Historically, the second was defined as 1/86,400 of a day (1832).
Later, with quartz crystal oscillators, it...
1 s = 1.15741 × 10d
1 d = 86,400 s
Second
Definition: The second (symbol: s) is the SI base unit of time. It is defined as the duration of 9,192,632,770 periods of radiation from the transition between two hyperfine levels of the ground state of a caesium-133 atom. This modern atomic definition ensures extreme accuracy.
Origin:
Historically, the second was defined as 1/86,400 of a day (1832).
Later, with quartz crystal oscillators, it was redefined as 1/31,556,925.9747 of the tropical year 1900 (adopted in 1960).
Since 1967, the atomic definition has been used, refined in 2018 for greater rigor.
Current Use: The second is the universal unit of time used in science, engineering, technology, and daily life. Almost all other time units (minutes, hours, days) are derived from it.
Day
Definition: A day is typically equal to 86,400 seconds, representing one complete rotation of Earth relative to the Sun.
Origin: The word day comes from the Old English dæg. Its meaning has evolved over centuries, with atomic time now giving precise measurement.
Current Use: Commonly refers to a 24-hour period but can also mean daylight hours (sunrise to sunset) or calendar days (Monday, Tuesday, etc.).
How to Convert Seconds to Days
• 1 s = 1.15741 × 10 d
• 1 d = 86,400 s
Example: Convert 15 s to days: 15 s = 15 × 1.15741 × 10 d = 0.0001736111 d
Second to Day Conversion Table
• 0.01 s = 0.0000001157 d
• 0.1 s = 0.000001157 d
• 1 s = 0.0000115741 d
• 2 s = 0.0000231481 d
• 3 s = 0.0000347222 d
• 5 s = 0.0000578704 d
• 10 s = 0.0001157407 d
• 20 s = 0.0002314815 d
• 50 s = 0.0005787037 d
• 100 s = 0.0011574074 d
• 1000 s = 0.0115740741 d
