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Kilojoules to Kilocalories

1 kilojoule = 0.23901 kilocalories · 1 kcal = 4.184 kJ

1 kilojoule = 0.23901 kilocalories

How it’s calculated

kcal = kJ ÷ 4.184

  • Divide the value in kilojoules by 4.184.
  • Equivalently, multiply by 0.2390057361.
  • 1 kJ = 0.2390057361 kcal · 1 kcal = 4.184 kJ
Show worked solutionFactor, unit cancellation and rounding, step by step

  1. Find the conversion factor

    By definition 1 kJ = 1000 J and 1 kcal = 4184 J, so 1 kcal = 4.184 kJ. Source: BIPM SI Brochure (9th ed.) (SI prefixes and accepted units); NIST SP 811 / Handbook 44.

  2. Multiply by the factor written as a fraction

    Put kJ in the denominator so it cancels, leaving kcal.

  3. Calculate (unrounded)

  4. Round the answer

    Rounded to 5 significant figures.

Answer: 0.23901 kcal

1 kJ in other units

Batch convert kJ → kcal
Results
  1. 1 kJ = 0.23901 kcal
  2. 5 kJ = 1.195 kcal
  3. 10 kJ = 2.3901 kcal
  4. 25 kJ = 5.9751 kcal

Permanent link to this conversion

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Quick examples

  • 1 kilojoule = 0.23901 kilocalories
  • 5 kilojoules = 1.195 kilocalories
  • 10 kilojoules = 2.3901 kilocalories
  • 25 kilojoules = 5.9751 kilocalories
  • 100 kilojoules = 23.901 kilocalories

About these units

Kilojoule (kJ)

SI (metric)

1 kJ = 1000 J

Source: BIPM SI Brochure (9th ed.) (SI prefixes and accepted units)

Kilocalorie (food Calorie) (kcal)

other

Exactly 4 184 J. A food "Calorie" on nutrition labels is one kilocalorie.

1 kcal = 4184 J

Source: NIST SP 811 / Handbook 44

Kilojoules to kilocalories conversion table

kilojoule (kJ) to kilocalorie (food Calorie) (kcal)
Kilojoules (kJ)Kilocalories (kcal)
0.1 kJ0.023901 kcal
0.5 kJ0.1195 kcal
1 kJ0.23901 kcal
2 kJ0.47801 kcal
3 kJ0.71702 kcal
4 kJ0.95602 kcal
5 kJ1.195 kcal
6 kJ1.434 kcal
7 kJ1.673 kcal
8 kJ1.912 kcal
9 kJ2.1511 kcal
10 kJ2.3901 kcal
15 kJ3.5851 kcal
20 kJ4.7801 kcal
25 kJ5.9751 kcal
30 kJ7.1702 kcal
40 kJ9.5602 kcal
50 kJ11.95 kcal
75 kJ17.925 kcal
100 kJ23.901 kcal
250 kJ59.751 kcal
500 kJ119.5 kcal
1,000 kJ239.01 kcal

Related conversions

Frequently asked questions

How do I convert kilojoules to kilocalories?

Use kcal = kJ ÷ 4.184. Divide the value in kilojoules by 4.184.

How many kilocalories are in 1 kilojoule?

1 kilojoule (kJ) equals 0.23901 kilocalories (kcal); more precisely 0.2390057361.

How many kilojoules are in 1 kilocalorie (food Calorie)?

1 kilocalorie (food Calorie) (kcal) equals 4.184 kilojoules (kJ).

What is 10 kJ in kcal?

10 kilojoules = 2.3901 kilocalories.

What is a kilocalorie (food Calorie)?

Exactly 4 184 J. A food "Calorie" on nutrition labels is one kilocalorie.

Formula: kcal = kJ ÷ 4.184. Factors last reviewed 2026-10-27.