Convert Kilocalories to Joules

Enter the energy in kilocalories below to get the value converted to joules.

Results in Joules:
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1 kcal = 4,184 J

How to Convert Kilocalories to Joules

To convert a kilocalorie measurement to a joule measurement, multiply the energy by the conversion ratio. One kilocalorie is equal to 4,184 joules, so use this simple formula to convert:

joules = kilocalories × 4,184

The energy in joules is equal to the kilocalories multiplied by 4,184.

For example, here's how to convert 5 kilocalories to joules using the formula above.
5 kcal = (5 × 4,184) = 20,920 J

Kilocalories and joules are both units used to measure energy. Keep reading to learn more about each unit of measure.


One kilocalorie, is equal to the heat needed to raise the temperature of one kilogram of water from 14.5 to 15.5 degrees Celsius.

Kilocalories can be abbreviated as kcal, for example 1 kilocalorie can be written as 1 kcal.

When being used to measure nutrition or metabolic processes, the large calorie is used, which is equal to one kilocalorie.


The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J, for example 1 joule can be written as 1 J.

Kilocalorie Measurements and Equivalent Joule Conversions

Common kilocalorie values converted to the equivalent joule value
Kilocalories Joules
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
6 kcal 25,104 J
7 kcal 29,288 J
8 kcal 33,472 J
9 kcal 37,656 J
10 kcal 41,840 J
11 kcal 46,024 J
12 kcal 50,208 J
13 kcal 54,392 J
14 kcal 58,576 J
15 kcal 62,760 J
16 kcal 66,944 J
17 kcal 71,128 J
18 kcal 75,312 J
19 kcal 79,496 J
20 kcal 83,680 J
21 kcal 87,864 J
22 kcal 92,048 J
23 kcal 96,232 J
24 kcal 100,416 J
25 kcal 104,600 J
26 kcal 108,784 J
27 kcal 112,968 J
28 kcal 117,152 J
29 kcal 121,336 J
30 kcal 125,520 J
31 kcal 129,704 J
32 kcal 133,888 J
33 kcal 138,072 J
34 kcal 142,256 J
35 kcal 146,440 J
36 kcal 150,624 J
37 kcal 154,808 J
38 kcal 158,992 J
39 kcal 163,176 J
40 kcal 167,360 J

More Kilocalorie Energy Conversions

Convert to Kilojoules
1 kcal is equal to 4.184 kilojoules
Convert to Megajoules
1 kcal is equal to 0.004184 megajoules
Convert to Gigajoules
1 kcal is equal to 4.184E-6 gigajoules
Convert to Calories
1 kcal is equal to 1,000 calories
Convert to Megacalories
1 kcal is equal to 0.001 megacalories
Watts x Time
Convert to Watt-hours
1 kcal is equal to 1.162222 watt-hours
Convert to Kilowatt-hours
1 kcal is equal to 0.001162 kilowatt-hours
Convert to Megawatt-hours
1 kcal is equal to 1.1622E-6 megawatt-hours
Convert to Watt-seconds
1 kcal is equal to 4,184 watt-seconds
Thermal Units
Convert to British Thermal Units
1 kcal is equal to 3.965667 british thermal units
Convert to Million BTU
1 kcal is equal to 3.9657E-6 million BTU
Convert to Therms
1 kcal is equal to 3.9657E-5 therms
Convert to Quads
1 kcal is equal to 3.9657E-15 quads
Convert to Electronvolts
1 kcal is equal to 26,113,999,999,999,999,475,712 electronvolts
Convert to Kiloelectronvolts
1 kcal is equal to 26,114,000,000,000,000,000 kiloelectronvolts
Convert to Megaelectronvolts
1 kcal is equal to 26,114,000,000,000,000 megaelectronvolts