Full name: second
Plural form: seconds
Symbol: s
Alternate spelling: sec
Category type: time
Scale factor: 1
The SI base unit for time is the second.
Valid units must be of the time type.
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The second (symbol s) is a unit for time, and one of seven SI base units. It is defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom at zero kelvins.
second to draconic month
second to tropical month
second to lunar year
second to Julian month
second to synodic month
second to sidereal year
second to hour
second to Gregorian year
second to anomalistic year
second to microsecond