NiftyRecipe Online energy conversion
BTU/kcal 0.252164 kWh/BTU 3412.141633 MJ/cal 239005.736138 kcal/BTU 3.965667 kJ/BTU 0.947817 kcal/cal 1000
cal / kJ

800 calories in kilojoule

3.3472 kilojoule

1 cal = 0.004184 kJ · factor

800 calories equals 3.3472 kilojoule-handy when reading a food label or logging a meal. Factor: 1 calorie = 0.004184 kilojoule.

Enter a value and click Calculate - opens the page with the new result

Formula: calorie to kilojoule

kJ = cal × 0.004184 (1 CAL = 0.004184 KJ)

Reference values: calorie → kilojoule
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

All amounts for this pair

FAQ for cal → kJ
800 calories in kilojoule

800 calories is 3.3472 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 800 calories always maps to 3.3472 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.