Energy Converter Online

What is an Energy Converter Tool?

An Energy Converter is a utility that translates a measurement of energy from one unit to another. It helps you quickly find out the equivalent value of energy in different systems, such as converting Kilowatt-hours (kWh) from your electricity bill into Joules (J) or food Calories (kcal) into Kilojoules (kJ).

How to use the Energy Converter?

• Enter the energy value you want to convert in the "From" field.
• Select the unit of energy you are starting with (e.g., Kilocalorie).
• Select the target unit you want to convert to (e.g., Kilojoule).
• The converted energy value will appear instantly in the "To" field.

What is the difference between a Calorie (cal) and a Kilocalorie (kcal)?

This is a very common point of confusion. A **Kilocalorie (kcal)** is the unit most people refer to as a "Calorie" on food nutrition labels (often written with a capital 'C').
1 Kilocalorie (kcal) = 1000 calories (cal).
A "small calorie" (cal) is the energy needed to raise 1 gram of water by 1°C. A "large Calorie" (kcal) is the energy needed to raise 1 *kilogram* of water by 1°C. Our tool includes both for clarity.

What is a Kilowatt-hour (kWh) and how does it relate to Joules?

A **Kilowatt-hour (kWh)** is a unit of energy, not power. It is most commonly used by electric utility companies to bill customers. It represents the energy consumed by using one kilowatt of power for one hour. The **Joule (J)** is the standard SI unit for energy. The conversion is exact: 1 kWh = 3,600,000 Joules (or 3.6 Megajoules), because 1 Watt = 1 Joule per second, and there are 3600 seconds in an hour.

What is a Joule (J) and where is it used?

The Joule (J) is the fundamental unit of energy in the International System of Units (SI). It is used extensively in all scientific fields, including physics, chemistry, and engineering. It is defined as the work done when a force of one newton is applied over a distance of one meter. While common in science, it is often too small for everyday use, which is why Kilojoules (kJ) or Megajoules (MJ) are more frequently seen.