Question: how many kg are in a kj?
Answer: The answer is 4.1858. We assume you are converting between kilojoule and kilogram calorie. You can view more details on each measurement unit: kilojoules or kilogram calorie The SI derived unit for energy is the joule. 1 joule is equal to 0.001 kilojoules, or 0.00023890295761862 kilogram calorie.