Energy & Work•Live Bidirectional•100% Client-Side
Energy Converter
Convert energy and work: Joules, Kilojoules, Calories, food kcal, Kilowatt-hours (kWh), and BTUs.
kJ
kcal
119.502868
Unit Equivalence:1 Kilojoule = 0.239006 Kilocalorie (Food kcal)(1 kcal = 4.184 kJ)
500 Kilojoule (kJ) in All Energy & Work Units
JouleJ
500000KilojoulekJ
500Gram Caloriecal
119502.868069Kilocalorie (Food kcal)kcal
119.502868Watt-hourWh
138.888889Kilowatt-hourkWh
0.138889Electron-volteV
3.1208e24British Thermal UnitBTU
473.908561Conversion Formula & Standards
Conversions follow International System of Units (SI) and ISO standard constants.
Target Energy = (Input Energy × From Ratio) / To Ratio
How to Use Energy Converter
01
Input energy quantity.
02
Select unit (e.g., kWh for home utility electric bills or kcal for nutrition).
03
Instantly calculate equivalents across thermodynamic and electrical scales.
Frequently Asked Questions
What is the difference between a small calorie and a dietary Calorie?
1 dietary Calorie (food calorie, kcal) equals 1,000 small gram calories (cal) or exactly 4,184 Joules.
How many Joules are in 1 Kilowatt-hour (kWh)?
1 kWh equals exactly 3,600,000 Joules (3.6 Megajoules).
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