ConvertAnything

⚡ Energy Converter

Convert between energy and work units

All Energy Conversions

Joule → Kilojoule Joule → Calorie Joule → Kilocalorie Joule → Watt-hour Joule → Kilowatt-hour Joule → Electronvolt Joule → British Thermal Unit Joule → Therm Kilojoule → Joule Kilojoule → Calorie Kilojoule → Kilocalorie Kilojoule → Watt-hour Kilojoule → Kilowatt-hour Kilojoule → Electronvolt Kilojoule → British Thermal Unit Kilojoule → Therm Calorie → Joule Calorie → Kilojoule Calorie → Kilocalorie Calorie → Watt-hour Calorie → Kilowatt-hour Calorie → Electronvolt Calorie → British Thermal Unit Calorie → Therm Kilocalorie → Joule Kilocalorie → Kilojoule Kilocalorie → Calorie Kilocalorie → Watt-hour Kilocalorie → Kilowatt-hour Kilocalorie → Electronvolt Kilocalorie → British Thermal Unit Kilocalorie → Therm Watt-hour → Joule Watt-hour → Kilojoule Watt-hour → Calorie Watt-hour → Kilocalorie Watt-hour → Kilowatt-hour Watt-hour → Electronvolt Watt-hour → British Thermal Unit Watt-hour → Therm Kilowatt-hour → Joule Kilowatt-hour → Kilojoule Kilowatt-hour → Calorie Kilowatt-hour → Kilocalorie Kilowatt-hour → Watt-hour Kilowatt-hour → Electronvolt Kilowatt-hour → British Thermal Unit Kilowatt-hour → Therm Electronvolt → Joule Electronvolt → Kilojoule Electronvolt → Calorie Electronvolt → Kilocalorie Electronvolt → Watt-hour Electronvolt → Kilowatt-hour Electronvolt → British Thermal Unit Electronvolt → Therm British Thermal Unit → Joule British Thermal Unit → Kilojoule British Thermal Unit → Calorie British Thermal Unit → Kilocalorie British Thermal Unit → Watt-hour British Thermal Unit → Kilowatt-hour British Thermal Unit → Electronvolt British Thermal Unit → Therm Therm → Joule Therm → Kilojoule Therm → Calorie Therm → Kilocalorie Therm → Watt-hour Therm → Kilowatt-hour Therm → Electronvolt Therm → British Thermal Unit

Common Conversions

From	To
1 J	0.001 kJ
1 J	0.23900574 cal
1 J	0.00023901 kcal
1 J	0.00027778 Wh
1 J	2.777778e-7 kWh
1 J	6.241509e+18 eV
1 J	0.00094782 BTU
1 J	9.478171e-9 thm
1 kJ	1,000 J
1 kJ	239.0057361 cal

Frequently Asked Questions

How do I convert energy units?

Select your source and target units from the dropdowns, enter a value, and the converter will instantly show the result. You can also use the swap button to reverse the conversion direction.

Are the energy conversions accurate?

Yes, all conversions use precise conversion factors from international standards. Results are displayed with up to 10 significant digits for maximum accuracy.

Can I convert between any energy units?

Absolutely. You can convert between any combination of the 9 energy units available on this page. Each pair also has its own dedicated converter page with detailed formulas and reference tables.