Energy Converter Tool

In physics, energy is the quantitative property that must be transferred to a body or to a physical system to perform work on the body, or to heat it. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed.

Energy Units Explained

• Joule (J): The SI unit of energy. It is equal to the energy transferred to (or work done on) an object when a force of one newton acts on that object in the direction of the force’s motion through a distance of one meter.
• Kilojoule (kJ): Equal to 1,000 joules. often used in food energy labeling in some countries.
• Calorie (cal): Approximate amount of energy needed to raise the temperature of one gram of water by one degree Celsius.
• Kilocalorie (kcal): Or “food calorie”. This is what you see on nutrition labels. 1 kcal = 1000 cal.
• Kilowatt-hour (kWh): A unit of energy equal to 3.6 megajoules. Commonly used for electrical energy billing.
• British Thermal Unit (BTU): Traditional unit of heat; it is defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit.

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Fun Fact: The “Calorie” you see on food labels is actually a Kilocalorie (kcal or Cal). If it were small calories, you’d need to eat 2,500,000 of them a day!