UnitConKilojoules to Calories (kcal) Converter
Convert kilojoules to kilocalories when reading European or Australian food labels, comparing dietary apps, or interpreting scientific nutrition data in familiar Calorie terms.
Formula
Divide kilojoules by 4.184 to get kilocalories. To reverse, multiply kilocalories by 4.184 to get kilojoules.
Quick reference
| Kilojoule (kJ) | Kilocalorie (kcal) |
|---|---|
| 100 | 23.90057 |
| 200 | 47.80115 |
| 400 | 95.60229 |
| 500 | 119.5029 |
| 800 | 191.2046 |
| 1000 | 239.0057 |
| 1500 | 358.5086 |
| 2000 | 478.0115 |
| 4000 | 956.0229 |
| 8368 | 2,000 |
About these units
Kilojoule
The kilojoule became the formal SI unit for food energy in countries adopting SI standards in the 20th century. Most international food packaging now lists both kJ and kcal to accommodate both conventions.
Kilocalorie
The kilocalorie (food Calorie) was introduced by American chemist Wilbur Atwater in the 1880s and became the nutritional energy standard in the US and many English-speaking countries. It remains ubiquitous in US dietary guidance.