Energy Unit Converter
Easily convert between various energy units.
Result
0.001 kJ
Frequently Asked Questions
What is energy and why is it measured in different units?
Energy is the fundamental capacity to do work or produce heat. Different units (like Joules, kWh, Calories, BTU) arose historically in various fields (physics, engineering, nutrition) to suit specific applications and scales, making conversions necessary for interdisciplinary work.
What is the SI unit of energy?
The SI (International System of Units) unit of energy is the Joule (J). It's defined as the work done when a force of one newton displaces an object by one meter in the direction of the force.
How are Joules, kWh, and Calories related?
Joules (J) are the base SI unit. Kilowatt-hours (kWh) are common for electrical energy (1 kWh = 3.6 million J). Calories (cal) are often used for food energy or heat (1 thermochemical calorie ≈ 4.184 J).
What is a British Thermal Unit (BTU)?
A British Thermal Unit (BTU) is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. It's commonly used in heating, ventilation, and air conditioning (HVAC) industries.
Why convert energy units?
Converting energy units allows for accurate comparisons, calculations, and communication across different scientific disciplines, industries, and everyday applications, such as comparing appliance energy efficiency or understanding dietary energy intake.
What's the difference between energy and power?
Energy is the total amount of work that can be done, while power is the rate at which energy is used or transferred. For example, a Joule is a unit of energy, while a Watt (Joule per second) is a unit of power.