Energy Converter
Convert joules, calories, kilowatt-hours, BTUs, and other energy units. Useful for nutrition labels, electricity bills, heating systems, and physics coursework.
Formula
target = source × (sourceToBase / targetToBase)
Energy is normalized to joules (J). One joule equals one newton-meter of work. Food calories and kilowatt-hours use defined conversion factors to joules.
Example
- Convert: 1 m × 3.28084= 3.28 ft
Result: 1 meter = 3.28 feet
Frequently Asked Questions
How many joules are in a calorie?
One calorie (thermochemical) equals 4.184 joules. Food labels use kilocalories (kcal), often written as 'Calories' with a capital C.
How do I convert kWh to joules?
Multiply kilowatt-hours by 3,600,000. One kWh is the energy consumed by a 1,000-watt device running for one hour.
What is a BTU?
A British Thermal Unit is the energy needed to raise one pound of water by one degree Fahrenheit. It is common in HVAC and heating fuel ratings.