How many Kilojoules are in 1 Calorie?

There are exactly 0.004184 Kilojoules (kJ) in 1 Calorie (cal). This means that to find the equivalent in Kilojoules, you multiply your Calorie value by 0.004184. This conversion factor is used worldwide in science, engineering, and everyday measurements.

What is 10 Calories in Kilojoules?

10 Calories (cal) is exactly 0.04184 Kilojoules (kJ). This is calculated by applying the standard conversion factor: 1 cal = 0.004184 kJ.

What is 100 Calories in Kilojoules?

100 Calories (cal) is exactly 0.4184 Kilojoules (kJ). This is calculated by applying the standard conversion factor: 1 cal = 0.004184 kJ.

How do I convert Kilojoules back to Calories?

To convert Kilojoules to Calories, divide the value in Kilojoules by 0.004184. For example, 1 kJ = 239.0057361 cal. You can also use the swap button on the converter above to instantly switch the conversion direction.

Why would I need to convert Calories to Kilojoules?

Converting Calories to Kilojoules is commonly needed in international trade, travel, academic studies, engineering projects, and everyday tasks where different measurement systems are used. Many countries use different standard units, making this conversion essential for accurate communication and calculations.

Is Calorie bigger than Kilojoule?

To compare, look at the conversion factor: 1 cal = 0.004184 kJ. If the result is greater than 1, then one Calorie is larger than one Kilojoule. Conversely, 1 kJ = 239.0057361 cal. Use this relationship to quickly understand the relative size of these two units.

What is the quickest way to convert Calories to Kilojoules?

The quickest way is to multiply your Calories value by 0.004184. For a mental math shortcut, remember that 1 cal is approximately 0.004184 kJ. Round this factor to a convenient number for rough estimates, or use the UnitShift converter above for exact results instantly.

How accurate is this Calorie to Kilojoule converter?

This converter uses full floating-point precision (64-bit double precision) for all calculations, ensuring results accurate to approximately 15 significant digits. The conversion factors between Calorie and Kilojoule are based on internationally recognized standards. For everyday use, scientific work, and engineering applications, this level of precision exceeds typical requirements.

Calorie → Kilojoule

From

0.004184kJ

Conversion Table

Conversion table from Calorie to Kilojoule
Calorie (cal)	Kilojoule (kJ)
0.001 cal	0.000004184 kJ
0.01 cal	0.00004184 kJ
0.1 cal	0.0004184 kJ
1 cal	0.004184 kJ
2 cal	0.008368 kJ
3 cal	0.012552 kJ
4 cal	0.016736 kJ
5 cal	0.02092 kJ
10 cal	0.04184 kJ
15 cal	0.06276 kJ
20 cal	0.08368 kJ
25 cal	0.1046 kJ
50 cal	0.2092 kJ
100 cal	0.4184 kJ
250 cal	1.046 kJ
500 cal	2.092 kJ
1,000 cal	4.184 kJ
5,000 cal	20.92 kJ
10,000 cal	41.84 kJ

Formula

To convert Calories to Kilojoules, divide the value by 239.006. For example, 5 cal equals 0.02092 kJ. You can also use UnitShift's free online converter above for instant, accurate results without manual calculation.

Calorie → Kilojoule: divide the value by 239.006

1 cal = 0.004184 kJ. To convert Calories to Kilojoules, multiply the calorie value by 0.004184.

Quick Facts

1 cal

0.004184 kJ

1 kJ

239.0057361 cal

10 cal

0.04184 kJ

100 cal

0.4184 kJ

How to Convert Calories to Kilojoules

Converting calories to kilojoules is one of the most common energy conversions. Whether you're working with international measurements, academic research, or everyday calculations, understanding the relationship between calories and kilojoules is essential. One calorie (cal) equals exactly 0.004184 kilojoules (kJ), and conversely, one kilojoule equals 239.0057361 calories.

This conversion is frequently used in nutrition and dietary calorie tracking and electricity consumption and billing. For quick reference: 10 calories = 0.04184 kilojoules, and 100 calories = 0.4184 kilojoules. Our converter above handles any value instantly, including decimal and negative numbers.

The calorie and kilojoule are both units of energy. The conversion factor between them is constant, making it straightforward to convert in either direction. Other common applications include fitness and exercise energy expenditure and industrial energy efficiency analysis.

Use the conversion table below for pre-calculated values, or enter any custom number in the converter above. All calculations are performed with full floating-point precision to ensure accuracy for both everyday use and professional applications. Bookmark this page for quick access whenever you need to convert calories to kilojoules.

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