18 calories in kilojoule
0.075312 kilojoule
1 cal = 0.004184 kJ · factor
18 calories equals 0.075312 kilojoule-handy when reading a food label or logging a meal. Factor: 1 calorie = 0.004184 kilojoule.
Common values
kJ = cal × 0.004184 (1 CAL = 0.004184 KJ)
| cal | kJ |
|---|---|
| 1 cal | 0.004184 kJ |
| 100 cal | 0.4184 kJ |
| 200 cal | 0.8368 kJ |
| 500 cal | 2.092 kJ |
| 1000 cal | 4.184 kJ |
| 2000 cal | 8.368 kJ |
Why do labels show both kcal and kJ?
Many regions require both. Roughly 1 kcal = 4.184 kJ. Use the calculator for any amount.
Is a food “Calorie” the same as a kilocalorie?
Yes. On labels, Calorie almost always means kilocalorie (kcal).
Manual conversion?
kJ = cal × 0.004184 (1 CAL = 0.004184 KJ)
Reverse conversion?
1 kilojoule ≈ 239.005736 calorie. Swap units in the form or use the reverse link.
How much is 18 calories on a food label in kilojoule?
0.075312 kilojoule. Factor 1 calorie = 0.004184 kilojoule.
18 calories is 0.075312 kilojoule using the standard food-energy factor on NiftyRecipe.
Package labels, recipe macros and fitness apps often jump between kilocalories and smaller calorie units (or kilojoules). Here the ratio stays constant: 1 calorie = 0.004184 kilojoule, so 18 calories always maps to 0.075312 kilojoule until you change the input. The reverse figure is 1 kilojoule ≈ 239.005736 calorie.
Use the field above to try another portion size, scale a recipe, or match two apps that print different units. Everything on this page stays inside nutrition-style energy units-no length, temperature or other measures mixed in.