boltUnit Conversion

Energy Converter

Convert between energy units: Joules, calories, kWh, BTU, and more.

check_circle11 Units: J, kJ, MJ, cal, kcal, Wh, kWh, BTU, ft⋅lb, eV, thm.
check_circleBidirectional: Select any from/to combination.
check_circleNutrition: Calories, kilocalories.
check_circleCommon Use: HVAC, nutrition, physics.

Energy Converter

Value

From Unit

To Unit

school Theory & Formulas

Energy Conversion Reference:

Base unit: Joule (J)

Common conversions:
• 1 kJ = 1,000 J
• 1 cal = 4.184 J
• 1 kcal = 4,184 J (food Calorie)
• 1 kWh = 3,600,000 J
• 1 BTU = 1,055.06 J
• 1 therm = 100,000 BTU