Unit Of Energy

The energy in simple terms can be defined as the capacity for doing work. It can occur in kinetic, potential, electrical, chemical, nuclear, thermal, and various other forms. It is classified as renewable energy and non-renewable energy. Further, in this article, we shall discuss the SI unit of energy, the other system.

SI Unit of Energy

Following is the table of SI unit:

SI unit Joules

Interestingly, the name of this international unit is kept in honor of James Prescott Joule, a British physicist whose works contributed to the establishment of the energy concept. When we look at the unit in fundamental terms, 1-N.m is equal to 1 Joule and, in terms of SI base units it can be represented as:


You may also like to learn more about other concepts related to energy like:

Units Of Energy List

Energy units can be preceded by various factors and there are usually different units for measuring energy. Some of the common units include:

  1. British thermal unit (BTU)
  2. Horsepower
  3. Kilowatt-hour (kWh)
  4. Calorie
  5. Electronvolts (eV)
  6. Hartree (the atomic unit of energy)
  7. Rydberg units
  8. Barrel of oil

CGS Unit Of Energy

Following is the table of the unit in the CGS system:

CGS unit erg

The erg is equal to 10-7 J. An erg is defined as the amount of the work done by the force of one dyne on one-centimeter distance.

Energy Conversion

Following is the table with energy conversion list:

Unit Joule Calorie BTU Kilowatt-hour
Joule 00 0.2390 0.000948 2.77778E-07
Calorie 4.187 00 0.00397 1.16279E-06
BTU 1055 252 00 0.000293
Kilowatt-hour 3.6E6 8.6E5 3412 00

Unit Of Energy In MKS System

Following is the table of the unit in the MKS system:

MKS unit Joule

Stay tuned with BYJU’S to learn about other Physics related concepts with interactive videos.

Practise This Question

When I was 12 years old i had a pair of blue coloured football shoes.Soon, i grew out of it. So,i bought a new pair of shoes. My mother kept the old pair safe and she gave it to my younger brother when he was old enough to wear it.Which among the 3 R's stratergies was implemented by her?