How many Kilojoules are in 1 Kilocalorie?

There are exactly 4.184 Kilojoules (kJ) in 1 Kilocalorie (kcal). This means that to find the equivalent in Kilojoules, you multiply your Kilocalorie value by 4.184. This conversion factor is used worldwide in science, engineering, and everyday measurements.

What is 10 Kilocalories in Kilojoules?

10 Kilocalories (kcal) is exactly 41.84 Kilojoules (kJ). This is calculated by applying the standard conversion factor: 1 kcal = 4.184 kJ.

What is 100 Kilocalories in Kilojoules?

100 Kilocalories (kcal) is exactly 418.4 Kilojoules (kJ). This is calculated by applying the standard conversion factor: 1 kcal = 4.184 kJ.

How do I convert Kilojoules back to Kilocalories?

To convert Kilojoules to Kilocalories, divide the value in Kilojoules by 4.184. For example, 1 kJ = 0.2390057361 kcal. You can also use the swap button on the converter above to instantly switch the conversion direction.

Why would I need to convert Kilocalories to Kilojoules?

Converting Kilocalories 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 Kilocalorie bigger than Kilojoule?

To compare, look at the conversion factor: 1 kcal = 4.184 kJ. If the result is greater than 1, then one Kilocalorie is larger than one Kilojoule. Conversely, 1 kJ = 0.2390057361 kcal. Use this relationship to quickly understand the relative size of these two units.

What is the quickest way to convert Kilocalories to Kilojoules?

The quickest way is to multiply your Kilocalories value by 4.184. For a mental math shortcut, remember that 1 kcal is approximately 4.184 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 Kilocalorie 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 Kilocalorie and Kilojoule are based on internationally recognized standards. For everyday use, scientific work, and engineering applications, this level of precision exceeds typical requirements.

Kilocalorie → Kilojoule

From

4.184kJ

Conversion Table

Conversion table from Kilocalorie to Kilojoule
Kilocalorie (kcal)	Kilojoule (kJ)
0.001 kcal	0.004184 kJ
0.01 kcal	0.04184 kJ
0.1 kcal	0.4184 kJ
1 kcal	4.184 kJ
2 kcal	8.368 kJ
3 kcal	12.552 kJ
4 kcal	16.736 kJ
5 kcal	20.92 kJ
10 kcal	41.84 kJ
15 kcal	62.76 kJ
20 kcal	83.68 kJ
25 kcal	104.6 kJ
50 kcal	209.2 kJ
100 kcal	418.4 kJ
250 kcal	1,046 kJ
500 kcal	2,092 kJ
1,000 kcal	4,184 kJ
5,000 kcal	20,920 kJ
10,000 kcal	41,840 kJ

Formula

To convert Kilocalories to Kilojoules, multiply the value by 4.18400. For example, 5 kcal equals 20.92 kJ. You can also use UnitShift's free online converter above for instant, accurate results without manual calculation.

Kilocalorie → Kilojoule: multiply the value by 4.18400

1 kcal = 4.184 kJ. To convert Kilocalories to Kilojoules, multiply the kilocalorie value by 4.184.

Quick Facts

1 kcal

4.184 kJ

1 kJ

0.2390057361 kcal

10 kcal

41.84 kJ

100 kcal

418.4 kJ

How to Convert Kilocalories to Kilojoules

Converting kilocalories 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 kilocalories and kilojoules is essential. One kilocalorie (kcal) equals exactly 4.184 kilojoules (kJ), and conversely, one kilojoule equals 0.2390057361 kilocalories.

This conversion is frequently used in nutrition and dietary calorie tracking and electricity consumption and billing. For quick reference: 10 kilocalories = 41.84 kilojoules, and 100 kilocalories = 418.4 kilojoules. Our converter above handles any value instantly, including decimal and negative numbers.

The kilocalorie 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 kilocalories to kilojoules.