Energy Basics
Learn about the definition of energy, the forms that it comes in, and the difference between renewable and nonrenewable sources.
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Energy Units Basics
How do we compare different types of fuels? One practical way is to convert the physical units of the fuels into British thermal units or “Btu.” A Btu is a precise measure of the heat content of fuels.
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Periodic Table
Coal, natural gas, and oil are hydrocarbons — made up of hydrogen and carbon atoms. Learn more about hydrogen, carbon, and the other chemical elements in this standard periodic table.
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Forms of Energy
Energy forms are either potential or kinetic. Potential energy comes in forms that are stored including — chemical, gravitational, mechanical, and nuclear. Kinetic energy forms are doing work — like electrical, heat, light, motion, and sound.
Laws of Energy
Sources of Energy
Energy Calculators
From gallons to British thermal units (Btu), kilowatthours to megajoules, short tons to metric tons — this handy calculator converts from one energy unit to another.
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Learn about the definition of energy, the forms that it comes in, and the difference between renewable and nonrenewable sources.
More Energy Basics »
Energy Units Basics
How do we compare different types of fuels? One practical way is to convert the physical units of the fuels into British thermal units or “Btu.” A Btu is a precise measure of the heat content of fuels.
More »
Periodic Table
Coal, natural gas, and oil are hydrocarbons — made up of hydrogen and carbon atoms. Learn more about hydrogen, carbon, and the other chemical elements in this standard periodic table.
More »
Forms of Energy
Energy forms are either potential or kinetic. Potential energy comes in forms that are stored including — chemical, gravitational, mechanical, and nuclear. Kinetic energy forms are doing work — like electrical, heat, light, motion, and sound.
Laws of Energy
Sources of Energy
Energy Calculators
From gallons to British thermal units (Btu), kilowatthours to megajoules, short tons to metric tons — this handy calculator converts from one energy unit to another.
More »