Kilocalories to Kilojoules Converter

1 kcal = 4.184 kJ. Type any value below for the exact kilojoules figure.

kcal
4.184kJ

1 kcal = 4.184 kJ

Conversion summary

1 kcal = 4.184 kJ

Formula
Kilojoule = Kilocalorie × 4.184
Category
Energy and Power
Units
kcal → kJ

1 kcal in other units

Values update with the converter above. Select a row to open that conversion's detailed page.

  • Joule4,184 J
  • Kilojoule4.184 kJ
  • Megajoule0.004184 MJ
  • Watt-hour1.162222 Wh
  • Kilowatt-hour0.001162222 kWh
  • Calorie1,000 cal
  • BTU3.965667 Btu
  • Therm0.00003965667 th
  • Quadrillion BTU3.96567E-15 quad BTU
  • Electronvolt2.61145E22 eV

How do you convert kilocalories to kilojoules?

To convert kilocalories to kilojoules, multiply the number of kilocalories by 4.184. 1 kcal = 4.184 kJ.

Conversion formula

Kilojoule = Kilocalorie × 4.184

Kilocalories to kilojoules conversion table

Kilocalories (kcal)Kilojoules (kJ)
1 kcal4.184 kJ
50 kcal209.2 kJ
100 kcal418.4 kJ
200 kcal836.8 kJ
500 kcal2,092 kJ
1,000 kcal4,184 kJ
2,000 kcal8,368 kJ

What is Kilocalorie?

The kilocalorie (food Calorie) is the unit actually used on food nutrition labels.

Short history of Kilocalorie

What is labeled "Calorie" on food packaging is actually a kilocalorie.

Open the Kilocalorie unit guide

What is Kilojoule?

The kilojoule is equal to 1,000 joules, used to express larger energy values practically.

Short history of Kilojoule

Common in nutrition labeling as an alternative to calories for expressing food energy.

Open the Kilojoule unit guide

Frequently asked questions

What is 1 Kilocalorie in Kilojoule?

1 kcal = 4.184 kJ.

How do you convert Kilocalorie to Kilojoule?

To convert kilocalories to kilojoules, multiply the number of kilocalories by 4.184. 1 kcal = 4.184 kJ.

Frequently asked questions

How many kilojoules are in 1 kilocalorie?

1 kcal = 4.184 kJ.

How do you convert kilocalories to kilojoules?

To convert kilocalories to kilojoules, multiply the number of kilocalories by 4.184. 1 kcal = 4.184 kJ.

How many kilocalories are in 1 kilojoule?

1 kJ = 0.239006 kcal.

Sources

  1. BIPM: The International System of Units (SI Brochure)
  2. NIST: NIST Guide to the SI — Appendix B.8: Factors for Units Listed Alphabetically
  3. NIST: Guide to the SI — Conversion Factors

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