Convert Energy Units

Convert between different energy units including joules, calories, kilowatt-hours, and more.

About Energy Units

Common Units

  • Joule (J): SI unit of energy
  • Calorie (cal): 4.184 joules
  • Kilowatt-hour (kWh): 3,600,000 joules
  • British Thermal Unit (BTU): 1,055.06 joules

Conversion Factors

  • 1 kJ = 1,000 J
  • 1 kcal = 4,184 J
  • 1 kWh = 3,600,000 J
  • 1 BTU = 1,055.06 J

Common Uses

  • Physics and engineering
  • Nutrition and food science
  • Electrical power
  • Thermodynamics



Disclaimer : The results provided by these calculators are for informational purposes only and should not be considered as financial, medical, or professional advice. The accuracy of the calculations depends on the information entered, and actual results may vary. We recommend consulting a financial advisor or healthcare professional for personalized guidance.