J

What is a Joule?

Definition

A joule (J) is the SI unit of energy equal to the work done when a force of one newton moves an object one meter.

Popular Joule Conversions

Most common conversions from Joules

1 J = 0.001 kJ Joule to Kilojoules 1 J = 0.239006 cal Joule to Calories 1 J = 0.0002390057 kcal Joule to Kilocalories 1 J = 0.0002777778 Wh Joule to Watt Hours 1 J = 0.00000027778 kWh Joule to Kilowatt Hours 1 J = 6,241,509,074,460,763,136 eV Joule to Electronvolts

History

The joule is named after English physicist James Prescott Joule. It was adopted as the SI unit of energy in 1889.

Common Uses

Scientific energy calculations
Food energy (alongside calories)
Electrical energy
Physics and engineering

Fun Facts

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A joule is about the energy to lift an apple 1 meter

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1 calorie equals 4.184 joules

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A 100-watt bulb uses 100 joules per second

All Joule Conversions

Joules to Kilojoules J → kJ Joules to Calories J → cal Joules to Kilocalories J → kcal Joules to Watt Hours J → Wh Joules to Kilowatt Hours J → kWh Joules to Electronvolts J → eV Joules to BTUs J → BTU Joules to Therms J → thm