›› Measurement unit: second

Full name: second

Plural form: seconds

Symbol: s

Alternate spelling: sec

Category type: time

Scale factor: 1

›› Similar units


›› SI unit: second

The SI base unit for time is the second.

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›› Definition: Second

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.

›› Sample conversions: second

second to minute
second to Julian month
second to sidereal year
second to decade
second to fortnight
second to lunar year
second to quarter
second to Gregorian month
second to synodic month