# 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 Minute 60 seconds Hour 60 minutes, or 3,600 seconds Day 24 hours, or 86,400 seconds Week 7 days, or 604,800 seconds Month 28-31 days, or 2,419,200-2,678.400 seconds Year 365.25 days, or about 31,557,600 seconds

Summary:

## 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.