The Difference Between Energy and Electricity
4 minute read • Last update May 2026
What is the difference between energy and electricity?
Energy and electricity are related concepts, but they are not synonymous. All electricity is a form of energy, but all energy does not exist as electricity.
You can compare energy and electricity to squares and rectangles. All squares are rectangles, but all rectangles are not squares.
- Energy is a much broader fundamental concept that refers to the capacity or ability to do work or cause change.
- Electricity is a specific form of energy that results from the existence of charged particles (like electrons).
- Electricity exists statically as an accumulation of charge or dynamically in a current (like the electricity that powers our homes).
What is energy?
Energy is a broad and fundamental concept that refers to the capacity to do work or cause a change.
What are the different forms of energy?
It exists in various forms, but energy can be classified into two major groups: kinetic or potential.
- Kinetic energy: Associated with motion of waves, electrons, atoms, molecules, substances, and objects
- Potential energy: Associated with stored energy related to the current position or state of an object
What are some examples of kinetic energy?
Kinetic energy takes the form of radiant energy, thermal or heat energy, motion energy, sound, and electrical energy.
- Radiant energy: Radiant energy is the movement of electromagnetic waves like visibile light, x-rays, gamma rays, and radio waves. A real-life example? Sunshine.
- Thermal or heat energy: Thermal energy comes from the increased movement of atoms and molecules. The more they move, the hotter something gets.
- Motion: Objects in motion have energy, like wind blowing, water rushing through a creek, waves crashing on a beach, or a car driving down a street.
- Sound: Sound is motion energy from vibration. Imagine plucking a guitar string or hitting a drum.
- Electrical energy: Electricial energy refers to the movement of electrons. Picture lightning striking a tree or electricity flowing through the wires in your home.
What are some examples of potential energy?
Potential energy is more difficult to understand than kinetic energy because it is stored or invisible. You can visibly see kinetic energy play out in front of your eyes, but potential energy is more abstract.
Categories of potential energy include chemical, mechanical, nuclear, and gravitational.
- Chemical energy: Stored in bonds of atoms and molecules. Coal has potential energy that is converted to thermal energy when burned.
- Mechanical energy: Stored in tension. When you sit on a spring mattress, the compressed springs have stored energy that is released when you stand up.
- Nuclear energy: Nuclear energy is stored within the nucleus of an atom and is what fuels a nuclear reactor through fission reactions.
- Gravitational energy: Energy stored in an object due to it’s height above the earth. An apple sitting on a teacher’s desk has potential energy that is released when it is knocked to the ground.
How is energy measured?
Energy is measured in joules (J) or other derived units such as kilojoules (kJ) or megajoules (MJ).
What is electricity?
Electricity is a specific form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.
In other words, electricity is a subset of energy, specifically the energy associated with the flow of electric charge.
How is electricity measured?
Electricity is measured in units called watts, a unit named after James Watt, the inventor of the team engine.
When dealing with larger amounts, electricity is measured in kilowatts, megawatts, gigawatts, or terawatts.
- 1 kilowatt = 1,000 watts
- 1 megawatt = 1,000 kilowatts or 1,000,000 watts
- 1 gigawatt = 1,000 megawatts or 1,000,000,000 watts
- 1 terawatt = 1,000 gigawatts or 1,000,000,000,000 watts
Electricity usage or consumption is measured in a function of watts combined with time called watt-hours. At higher levels of consumption or production, electricity is measured in kilowatt-hours, megawatt-hours, gigawatt-hours, and terawatt-hours.
How is energy used to generate electricity?
Many sources and forms of energy are used around the globe to generate electricity including motion, thermal, and nuclear energy.
Let’s tackle the most popular sources of electricity generation (fossil fuels, solar, wind, hydro, and nuclear) and identify which form of energy they are.
Fossil fuels
Fossil fuels like coal, oil, and natural gas initially represent chemical energy. As the fossil fuels are burned, the energy transforms to thermal or heat energy.
Heat is used to boil water to steam which is then used to rotate a turbine, which generates electricity.
Solar power
Solar power begins as radiant energy, light traveling to Earth from the Sun. As photons from sunlight hit solar panels, they stimulate the movement of electrons which generates electricity.
Wind power
Wind power begins as kinetic energy, the movement of air through the atmosphere. As air hits the blades of a wind turbine, the movement of the wind turbine is used to generate electricity.
Hydroelectric power
Hydro power also begins as kinetic energy via the movement of water. The movement of water is used to rotate turbines, which generate electricity.
Nuclear power
Nuclear power starts as, you guessed it, nuclear energy. Nuclear energy is a form of potential energy. Nuclear power plants use fission reactions to split atoms apart. When atoms split, they release heat energy. This heat energy is used to boil water, which is used to rotate a turbine that can generate electricity.
Why the difference between energy and electricity matters
The difference between energy and electricity matters because electricity is just a single type of energy. Energy is a more general concept that includes various forms, including electricity. Electricity is one specific form of energy characterized by the flow of electric charge. The distinction is crucial because it helps us understand that electricity is just one aspect of the larger concept of energy.
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