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Kilocalories to joules conversion

Select calorie unit type: 
Energy result in joules:J

How to convert from kcal to joules

Thermochemical / food kilocalories to joules

1 kcalth = 4184 J

The energy in joules E(J) is equal to 4184 times the energy in thermochemical / food kilocalories E(kcal):

E(J) = 4184 × E(kcal-th)


Joules to kcal conversion