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Common Units of Energy | What is the SI Unit of Energy?

Common Units of Energy – Energy is the capacity to do work and exists in various forms, including kinetic, potential, electrical chemical, and thermal. It’s classified into renewable (like solar and wind) and non-renewable (such as fossil fuels and nuclear). Common units for measuring energy include the joule, calorie, kilowatt-hour, and British Thermal Unit. Understanding energy units and sources is crucial for addressing our energy needs sustainably.

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What is the SI Unit of Energy?

The international unit of energy, the joule, is named in honor of James Prescott Joule, a British physicist whose groundbreaking work played a pivotal role in developing the concept of energy. In fundamental terms, 1 joule is equal to 1 newton-meter (1 N·m). In the context of SI base units, it can be represented as 1 joule = 1 kilogram·meter²/second², illustrating its relationship to mass, distance, and time.

What is the CGS Unit of Energy?

One erg is equal to 10-7 J. An erg is defined as the amount of work done by the force of one dyne at a one-centimetre distance.

What is the Unit Of Energy In MKS System?

In the MKS (meter-kilogram-second) system, which is a metric system of units commonly used in science and engineering, the unit of energy is the joule (J). So, the MKS unit of energy is the joule.

Units of Energy List

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

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

Energy Conversion

Following is the table with the energy conversion list:

UnitJouleCalorieBTUKilowatt-hour
Joule000.23900.0009482.77778E-07
Calorie4.187000.003971.16279E-06
BTU1055252000.000293
Kilowatt-hour3.6E68.6E5341200

Commercial Unit of Energy

Kilowatt-hour is the commercial unit of energy.
When large quantities of energy are expressed, the SI unit of energy becomes small. Therefore, the commercial unit is used.

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