Energy Converter.

Convert between all major energy units including joule, kilojoule, calorie, kilocalorie, watthour, and more. Professional grade accuracy and real-time results.

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What is Energy?

Energy is a fundamental physical quantity. In the International System of Units (SI), the base unit for energy is the joule. Our energy converter helps you switch between metric, imperial, and other specialized units used in different industries.

Popular Energy Conversions

joule to joule joule to kilojoule joule to calorie joule to kilocalorie joule to watthour joule to kilowatthour

Quick Conversion Table

JOULE KILOJOULE

1 0.001

5 0.005

10 0.01

25 0.025

50 0.05

100 0.1

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