Energy Converter
Energy is the quantitative property that must be transferred to a body or physical system to perform work on the body, or to heat it. Because energy manifests in so many forms—thermal, electrical, kinetic, chemical—different fields have developed their own measurement standards.
This professional converter unifies these distinct worlds. It translates between the Joule (physics standard), the Kilowatt-hour (electrical billing), the Calorie (nutrition), and the BTU (HVAC systems), ensuring accurate conversion for any application.
Metric (SI)
PhysicsElectricity
PowerHeat & Food
ThermalAtomic
MicroDid you know?
The “Calories” on food labels are actually Kilocalories (kcal).
1 Food Calorie = 1,000 thermal calories = 4,184 Joules.
Context & Usage
Energy units are often specific to industry.
- Joule (J): The standard SI unit. Used for mechanical work and general scientific measurements.
- Kilowatt-hour (kWh): The standard unit for electricity billing. 1 kWh is the energy consumed by a 1,000 Watt appliance running for 1 hour.
- BTU: British Thermal Unit. Used primarily in the US for heating and air conditioning power.
- Electronvolt (eV): Used in particle physics to describe the energy of individual photons or electrons.
References
How to Use This Converter
Instantly convert energy values across science and industry.
Enter Value
Type the value into the known field (e.g., enter “2000” in Food Calories/kcal).
View Equivalents
The tool instantly calculates the corresponding energy in Joules, kWh, and BTUs.
Copy Result
Click the button to copy the precise value to your clipboard.