Kilojoule to Kilocalorie & Kilocalorie to Kilojoule

Effortlessly convert kilojoules to kilocalories and vice versa with Examples.com. Enter your data for quick, accurate conversions.

Conversion Factors:

• Kilojoules to Kilocalories: 1 kilocalorie = 4.184 kilojoules
• Kilocalories to Kilojoules: 1 kilojoule = 1/4.184 kilocalories

How to Convert Kilojoules to Kilocalories:

To convert kilojoules to kilocalories, divide the number of kilojoules by 4.184.

Kilocalories (kcal) = Kilojoules (kJ)/4.184

Example: Convert 2000 kilojoules to kilocalories.

Kilocalories = 2000 kJ/4.184 = 478.68 kcal

How to Convert Kilocalories to Kilojoules:

To convert kilocalories to kilojoules, multiply the number of kilocalories by 4.184.

Kilojoules (kJ) = Kilocalories (kcal)×4.184

Example: Convert 3 kilocalories to kilojoules.

Kilojoules = 3 kcal×4.184 = 12.552 kJ

Kilojoules to Kilocalories Conversion Table

Kilojoules (kJ)	Kilocalories (kcal)
1 kJ	0.239 kcal
2 kJ	0.478 kcal
3 kJ	0.717 kcal
4 kJ	0.956 kcal
5 kJ	1.195 kcal
6 kJ	1.434 kcal
7 kJ	1.673 kcal
8 kJ	1.912 kcal
9 kJ	2.151 kcal
10 kJ	2.390 kcal
20 kJ	4.780 kcal
30 kJ	7.170 kcal
40 kJ	9.560 kcal
50 kJ	11.950 kcal
60 kJ	14.340 kcal
70 kJ	16.730 kcal
80 kJ	19.120 kcal
90 kJ	21.510 kcal
100 kJ	23.900 kcal

kJ to kcal Conversion Chart

Kilocalories to Kilojoules Conversion Table

Kilocalories (kcal)	Kilojoules (kJ)
1 kcal	4.184 kJ
2 kcal	8.368 kJ
3 kcal	12.552 kJ
4 kcal	16.736 kJ
5 kcal	20.920 kJ
6 kcal	25.104 kJ
7 kcal	29.288 kJ
8 kcal	33.472 kJ
9 kcal	37.656 kJ
10 kcal	41.840 kJ
20 kcal	83.680 kJ
30 kcal	125.520 kJ
40 kcal	167.360 kJ
50 kcal	209.200 kJ
60 kcal	251.040 kJ
70 kcal	292.880 kJ
80 kcal	334.720 kJ
90 kcal	376.560 kJ
100 kcal	418.400 kJ

kcal to kJ Conversion Chart

Difference Between Kilojoules to Kilocalories

Aspect	Kilojoules (kJ)	Kilocalories (kcal)
Unit of Measurement	Kilojoule is a unit of energy in the metric system.	Kilocalorie is a unit of energy in the metric system, commonly used in nutrition.
Symbol	Represented by “kJ”.	Represented by “kcal”.
Conversion Factor	1 kilojoule = 0.239 kilocalories.	1 kilocalorie = 4.184 kilojoules.
Common Use	Widely used in scientific contexts and in most countries to express energy values.	Commonly used in nutrition to indicate the energy content in food.
Global Preference	Preferred in many countries for energy-related measurements, especially in scientific literature.	Often used in the United States and some other countries for food energy values.
Energy Expression	Expresses energy in joules (1 kilojoule = 1000 joules).	Expresses energy in terms of calories (1 kilocalorie = 1000 calories).
Nutritional Labeling	Seen on food packaging in countries using the metric system, e.g., Australia, New Zealand.	Seen on food packaging, particularly in the United States.
Historical Context	Part of the International System of Units (SI), adopted globally for various scientific measures.	Originates from the concept of calorie used to measure heat energy in food.

1. Solved Examples on Converting Kilojoules to Kilocalories

Example 1:

Convert 50 kilojoules to kilocalories.

Kilocalories (kcal) = Kilojoules (kJ)/4.184

Calculation: Kilocalories = 50 kJ/4.184 = 11.95 kcal

Example 2:

Convert 120 kilojoules to kilocalories.

Calculation: Kilocalories = 120 kJ/4.184 = 28.68 kcal

Example 3:

Convert 250 kilojoules to kilocalories.

Calculation: Kilocalories = 250 kJ/4.184 = 59.75 kcal

Example 4:

Convert 360 kilojoules to kilocalories.

Calculation: Kilocalories = 360 kJ/4.184 = 86.06 kcal

Example 5:

Convert 500 kilojoules to kilocalories.

Calculation: Kilocalories = 500 kJ4.184 = 119.47 kcal

2. Solved Examples on Converting Kilocalories to Kilojoules

Example 1:

Convert 10 kilocalories to kilojoules.

Kilojoules (kJ) = Kilocalories (kcal)×4.184

Calculation: Kilojoules = 10 kcal×4.184 = 41.84 kJ

Example 2:

Convert 25 kilocalories to kilojoules.

Calculation: Kilojoules = 25 kcal×4.184 = 104.60 kJ

Example 3:

Convert 50 kilocalories to kilojoules.

Calculation: Kilojoules = 50 kcal×4.184 = 209.20 kJ

Example 4:

Convert 75 kilocalories to kilojoules.

Calculation: Kilojoules = 75 kcal×4.184 = 313.80 kJ

Example 5:

Convert 100 kilocalories to kilojoules.

Calculation: Kilojoules = 100 kcal×4.184 = 418.40 kJ

How accurate is the conversion between kilojoules and kilocalories?

The conversion is accurate as per the defined conversion factor, 1 kilocalorie = 4.184 kilojoules. Calculations based on this factor are precise and reliable.

Why do we use kilojoules and kilocalories?

Kilojoules and kilocalories are both units of energy. Kilojoules are commonly used in scientific contexts and in most countries to express energy values, while kilocalories are commonly used in nutrition to indicate the energy content in food, especially in the United States.

Is the term “calorie” the same as “kilocalorie”?

In nutritional contexts, “calorie” often refers to a kilocalorie (kcal), which is equal to 1,000 small calories (cal). The term kilocalorie is more precise but is commonly abbreviated to calorie in everyday use.

What is the importance of converting kilojoules to kilocalories?

Converting kilojoules to kilocalories is important for understanding nutritional information on food labels, especially when comparing energy content across different measurement systems. It helps in making informed dietary choices based on familiar units.

Are kilojoules and kilocalories interchangeable in recipes?

When following recipes, it’s important to use the specified unit of measurement to ensure accuracy. If a recipe lists energy content in kilojoules, you can convert it to kilocalories if needed, and vice versa, using the conversion factor.