How many Joules are in 1 Kilocalorie?

There are exactly 4,184 Joules (J) in 1 Kilocalorie (kcal). This means that to find the equivalent in Joules, 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 Joules?

10 Kilocalories (kcal) is exactly 41,840 Joules (J). This is calculated by applying the standard conversion factor: 1 kcal = 4,184 J.

What is 100 Kilocalories in Joules?

100 Kilocalories (kcal) is exactly 418,400 Joules (J). This is calculated by applying the standard conversion factor: 1 kcal = 4,184 J.

How do I convert Joules back to Kilocalories?

To convert Joules to Kilocalories, divide the value in Joules by 4,184. For example, 1 J = 0.0002390057361 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 Joules?

Converting Kilocalories to Joules 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 Joule?

To compare, look at the conversion factor: 1 kcal = 4,184 J. If the result is greater than 1, then one Kilocalorie is larger than one Joule. Conversely, 1 J = 0.0002390057361 kcal. Use this relationship to quickly understand the relative size of these two units.

What is the quickest way to convert Kilocalories to Joules?

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 J. 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 Joule 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 Joule are based on internationally recognized standards. For everyday use, scientific work, and engineering applications, this level of precision exceeds typical requirements.

Kilocalorie → Joule

From

4,184J

Conversion Table

Conversion table from Kilocalorie to Joule
Kilocalorie (kcal)	Joule (J)
0.001 kcal	4.184 J
0.01 kcal	41.84 J
0.1 kcal	418.4 J
1 kcal	4,184 J
2 kcal	8,368 J
3 kcal	12,552 J
4 kcal	16,736 J
5 kcal	20,920 J
10 kcal	41,840 J
15 kcal	62,760 J
20 kcal	83,680 J
25 kcal	104,600 J
50 kcal	209,200 J
100 kcal	418,400 J
250 kcal	1,046,000 J
500 kcal	2,092,000 J
1,000 kcal	4,184,000 J
5,000 kcal	20,920,000 J
10,000 kcal	41,840,000 J

Formula

To convert Kilocalories to Joules, multiply the value by 4184. For example, 5 kcal equals 20,920 J. You can also use UnitShift's free online converter above for instant, accurate results without manual calculation.

Kilocalorie → Joule: multiply the value by 4184

1 kcal = 4,184 J. To convert Kilocalories to Joules, multiply the kilocalorie value by 4,184.

Quick Facts

1 kcal

4,184 J

1 J

0.0002390057361 kcal

10 kcal

41,840 J

100 kcal

418,400 J

How to Convert Kilocalories to Joules

Converting kilocalories to joules 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 joules is essential. One kilocalorie (kcal) equals exactly 4,184 joules (J), and conversely, one joule equals 0.0002390057361 kilocalories.

This conversion is frequently used in nutrition and dietary calorie tracking and electricity consumption and billing. For quick reference: 10 kilocalories = 41,840 joules, and 100 kilocalories = 418,400 joules. Our converter above handles any value instantly, including decimal and negative numbers.

The kilocalorie and joule 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 joules.

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