Calories to Joules Converter

Calories to Joules Converter is evaluated from Kilocalories and Kilojoules. The calculation reports Kilocalories, Kilojoules and Joules.

Results

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About the Calories to Joules Converter

Calories to Joules Converter is treated here as a quantitative relation between Kilocalories and Kilojoules and Kilocalories, Kilojoules, Joules and BTU.

The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.

Formula basis:
kcal → kJ: kJ = kcal x 4.184
kcal → J: J = kcal x 4,184
kJ → kcal: kcal = kJ / 4.184
1 kcal = 3.96832 BTU
Thermochemical calorie: 1 cal = 4.184 J (NIST definition)

Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.

Formula & How It Works

The calculation applies the following relations exactly as recorded in the metadata:

kcal → kJ: kJ = kcal x 4.184
kcal → J: J = kcal x 4,184
kJ → kcal: kcal = kJ / 4.184
1 kcal = 3.96832 BTU
Thermochemical calorie: 1 cal = 4.184 J (NIST definition)

Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.

Worked Examples

Example 1: McDonald's Big Mac: 550 kcal

Inputs

kcal: 550
Kilocalories: 550 kcal. Kilojoules: 2,301.2 kJ. Joules: 2,301,200 J. BTU: 2,182.576 BTU. Watt-Hours: 639.65 Wh

With Kilocalories = 550 as the stated inputs, the result is Kilocalories = 550 kcal, Kilojoules = 2,301.2 kJ and Joules = 2,301,200 J. Each value corresponds to the declared output fields.

Example 2: Daily Workout: 500 kcal burned

Inputs

kcal: 500
Kilocalories: 500 kcal. Kilojoules: 2,092 kJ. Joules: 2,092,000 J. BTU: 1,984.16 BTU. Watt-Hours: 581.5 Wh

With Kilocalories = 500 as the stated inputs, the result is Kilocalories = 500 kcal, Kilojoules = 2,092 kJ and Joules = 2,092,000 J. Each value corresponds to the declared output fields.

Example 3: Australian Food Label: 1,500 kJ

Inputs

kj: 1500
Kilocalories: 358.51 kcal. Kilojoules: 1,500 kJ. Joules: 1,500,000 J. BTU: 1,421.726 BTU. Watt-Hours: 416.667 Wh

With Kilojoules = 1,500 as the stated inputs, the result is Kilocalories = 358.51 kcal, Kilojoules = 1,500 kJ and Joules = 1,500,000 J. Each value corresponds to the declared output fields.

Example 4: Bomb Calorimetry: Wheat sample 15,000 kJ/kg

Inputs

kj: 15000
Kilocalories: 3,585.09 kcal. Kilojoules: 15,000 kJ. Joules: 15,000,000 J. BTU: 14,217.255 BTU. Watt-Hours: 4,166.667 Wh

With Kilojoules = 15,000 as the stated inputs, the result is Kilocalories = 3,585.09 kcal, Kilojoules = 15,000 kJ and Joules = 15,000,000 J. Each value corresponds to the declared output fields.

Common Use Cases

  • Convert food label calories to joules for science project
  • Convert exercise energy from kcal to kJ
  • Convert bomb calorimetry results from kJ to kcal