The SI Unit of Time is

By BYJU'S Exam Prep

Updated on: September 25th, 2023

The SI Unit of Time is second. It is determined by using the fixed numerical value of the cesium frequency, vCs, the unperturbed ground-state hyperfine transition frequency of the cesium 133 atoms, to be 9192631770 when indicate in the Hz unit, which is equal to s-1. The unit second is often represented as ‘s’ or sec. The SI consists of a coherent system of units of measurement beginning with seven base units, which are the second (s), kelvin (K), kilogram (kg), ampere (A), meter (m) candela (cd), and mole (mol).

Unit of Time

Any specific period of time that is used to measure or represent duration on a regular basis is referred to as a unit of time. Below are given various units of time.

Units of Time


60 seconds


60 minutes, or 3,600 seconds


24 hours, or 86,400 seconds


7 days, or 604,800 seconds


28-31 days, or 2,419,200-2,678.400 seconds


365.25 days, or about 31,557,600 seconds


The SI Unit of Time is

The SI unit of time is called seconds which is represented with the small letter “s”. Any specific time period that is used as a benchmark for measuring or expressing duration is referred to as a unit of time.

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