Energy Converter
Energy Converter
Convert between Joules, Calories, BTU, Watt-hours and more.
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What is Energy Conversion?
Energy conversion is the process of changing energy from one form to another. In physics, energy is a quantity that provides the capacity to perform work. Because energy is used in many different fields—from nutrition (calories) to electricity (kilowatt-hours) and mechanical engineering (joules)—it is often necessary to convert these units to understand the data better.
Common Energy Units
- Joule (J): The standard SI unit of energy.
- Kilowatt-hour (kWh): Commonly used to measure electrical energy consumption in households.
- Calorie (cal): Often used in chemistry and biology, specifically regarding heat energy and food.
- BTU (British Thermal Unit): A traditional unit used in heating and air conditioning industries.
Frequently Asked Questions
How many Joules are in 1 Kilowatt-hour?
One kilowatt-hour (1 kWh) is exactly equal to 3,600,000 Joules (or 3.6 Megajoules). This is calculated because 1 Watt is 1 Joule per second, and there are 3,600 seconds in an hour.
What is the difference between a Calorie and a Kilocalorie?
In scientific terms, 1 kilocalorie (kcal) equals 1,000 small calories (cal). However, in food nutrition labels, the word “Calorie” (with a capital C) usually refers to a kilocalorie. Our converter distinguishes between the two for precision.