Energy Converter — Free Online Tool

Convert between joules, calories, BTU, kWh, and more energy units. Perfect for physics, nutrition, and electricity calculations. Convert any energy converter pair instantly with accurate, bidirectional results.

72 conversion pairs

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Popular Energy Converter Pairs

Kilocalorie to Kilojoule Kilojoule to Kilocalorie Kilowatt-hour to Joule Joule to Kilowatt-hour British Thermal Unit to Kilowatt-hour Calorie to Joule

All Energy Converter Conversions

72 conversion pairs available — browse by unit or jump to a popular pair above.

From Joule (J)

Joule to Kilojoule Joule to Calorie Joule to Kilocalorie Joule to Watt-hour Joule to British Thermal Unit Joule to Foot-pound Joule to Electronvolt

From Kilojoule (kJ)

Kilojoule to Joule Kilojoule to Calorie Kilojoule to Watt-hour Kilojoule to Kilowatt-hour Kilojoule to British Thermal Unit Kilojoule to Foot-pound Kilojoule to Electronvolt

From Calorie (cal)

Calorie to Kilojoule Calorie to Kilocalorie Calorie to Watt-hour Calorie to Kilowatt-hour Calorie to British Thermal Unit Calorie to Foot-pound Calorie to Electronvolt

From Kilocalorie (kcal)

Kilocalorie to Joule Kilocalorie to Calorie Kilocalorie to Watt-hour Kilocalorie to Kilowatt-hour Kilocalorie to British Thermal Unit Kilocalorie to Foot-pound Kilocalorie to Electronvolt

From Watt-hour (Wh)

Watt-hour to Joule Watt-hour to Kilojoule Watt-hour to Calorie Watt-hour to Kilocalorie Watt-hour to Kilowatt-hour Watt-hour to British Thermal Unit Watt-hour to Foot-pound Watt-hour to Electronvolt

From Kilowatt-hour (kWh)

Kilowatt-hour to Kilojoule Kilowatt-hour to Calorie Kilowatt-hour to Kilocalorie Kilowatt-hour to Watt-hour Kilowatt-hour to British Thermal Unit Kilowatt-hour to Foot-pound Kilowatt-hour to Electronvolt

From British Thermal Unit (BTU)

British Thermal Unit to Joule British Thermal Unit to Kilojoule British Thermal Unit to Calorie British Thermal Unit to Kilocalorie British Thermal Unit to Watt-hour British Thermal Unit to Foot-pound British Thermal Unit to Electronvolt

From Foot-pound (ft·lb)

Foot-pound to Joule Foot-pound to Kilojoule Foot-pound to Calorie Foot-pound to Kilocalorie Foot-pound to Watt-hour Foot-pound to Kilowatt-hour Foot-pound to British Thermal Unit Foot-pound to Electronvolt

From Electronvolt (eV)

Electronvolt to Joule Electronvolt to Kilojoule Electronvolt to Calorie Electronvolt to Kilocalorie Electronvolt to Watt-hour Electronvolt to Kilowatt-hour Electronvolt to British Thermal Unit Electronvolt to Foot-pound

Free Energy Converter — All Unit Pairs | ConvertRubix