Measurement is an important parameter that defines quantity. It is the fundamental of science and is applied in all fields like engineering, construction, cooking, running, stitching and even arts. Measuring a substance or a quantity is essential to understand and also to achieve precision. In the early days’ man used to measure the numerals with sticks and time with the help of the sun.

We teach children from a young age the concept of measurement using fingers and objects. In labs we use devices like calipers, micrometers, ammeters and many more for the measuring purpose. The smallest value that can be measured by the measuring instrument is called its least count. Example: Micrometer least count is 0.01 mm.

Each quantity has to be measured in its own way. Example: Time cannot be measured in kilometres and vice versa. Hence it is necessary to learn the ways of measuring each quantity with its own specifications.

In this article, let us learn in detail about the standard units of measurement.

Know The Standard Units

Standard units are commonly used units of measurement, which help us measure height, length, weight, temperature, mass and many more. Since these units are standardised according to the international standards, it holds the same meaning and value throughout the world. According to the international standard units, these are the seven base units along with their measurement.

Property Unit Symbol
Length meter m
Mass kilogram kg
Time second s
Electric Current Ampere A
Temperature Kelvin K
Amount of Substance mole mol
Luminous Intensity candela cd

 

The International System of Units (SI), commonly known as the metric system, is the international standard for measurement. The SI units are composed of 7 base units that define the 22 derived units with respective names along with their symbols. Standard units of measurement play an essential role in international commerce and are commonly used in scientific and technological research and development. Now let us know about each unit individually in detail.

Length

It is the term used for identifying the size of an object or distance between two points. According to the International system of quantities, the length is a quantity with dimension distance. The base unit for length is a meter.

Mass

Mass is the fundamental property of all matter and is a quantitative measure of inertia. The greater the mass of a body, the smaller the change produced by an applied force. The base unit of mass is kilogram.

Time

Time is the measure of events that take place in the past, future and also present. It is a scalar quantity that reads the clock. It is measured in seconds, Minutes, hours, Days or weeks or months or years.

Electric Current

An electric current is a stream of charged particles like ions or electrons, moving through an electrical conductor or space. The amount of electric charge passing a point in an electric circuit per unit time is given by Ampere (A).

Temperature

Temperature is a physical quantity that expresses hotness and coldness of a body or object. It is the representation of thermal energy. It is measured using Degrees Celsius.

 

Amount of Substance

Amount of Substance is defined as the number of discrete atomic-scale particles in it divided by the Avogadro constant. It is measured using mole. The mole (mol) is a number that relates molecular or atomic mass to a constant number of particles.

Luminous Intensity

The SI unit of luminous intensity is the candela. Luminous intensity is a unit used for measuring the wavelength-weighted power emitted by a light source.