Kilocalories to Gigajoules (kcal → GJ)
Formula
1 kcal = 0.000004184 GJConversion Table
| kcal | GJ |
|---|---|
| 0 | 0 |
| 1.0000 | 0.0000041840 |
| 2.0000 | 0.0000083680 |
| 3.0000 | 0.000012552 |
| 4.0000 | 0.000016736 |
| 5.0000 | 0.000020920 |
| 6.0000 | 0.000025104 |
| 7.0000 | 0.000029288 |
| 8.0000 | 0.000033472 |
| 9.0000 | 0.000037656 |
| 10.000 | 0.000041840 |
| 11.000 | 0.000046024 |
| 12.000 | 0.000050208 |
| 13.000 | 0.000054392 |
| 14.000 | 0.000058576 |
| 15.000 | 0.000062760 |
| 16.000 | 0.000066944 |
| 17.000 | 0.000071128 |
| 18.000 | 0.000075312 |
| 19.000 | 0.000079496 |
| kcal | GJ |
|---|---|
| 20.000 | 0.000083680 |
| 21.000 | 0.000087864 |
| 22.000 | 0.000092048 |
| 23.000 | 0.000096232 |
| 24.000 | 0.00010042 |
| 25.000 | 0.00010460 |
| 26.000 | 0.00010878 |
| 27.000 | 0.00011297 |
| 28.000 | 0.00011715 |
| 29.000 | 0.00012134 |
| 30.000 | 0.00012552 |
| 31.000 | 0.00012970 |
| 32.000 | 0.00013389 |
| 33.000 | 0.00013807 |
| 34.000 | 0.00014226 |
| 35.000 | 0.00014644 |
| 36.000 | 0.00015062 |
| 37.000 | 0.00015481 |
| 38.000 | 0.00015899 |
| 39.000 | 0.00016318 |
| kcal | GJ |
|---|---|
| 40.000 | 0.00016736 |
| 41.000 | 0.00017154 |
| 42.000 | 0.00017573 |
| 43.000 | 0.00017991 |
| 44.000 | 0.00018410 |
| 45.000 | 0.00018828 |
| 46.000 | 0.00019246 |
| 47.000 | 0.00019665 |
| 48.000 | 0.00020083 |
| 49.000 | 0.00020502 |
| 50.000 | 0.00020920 |
| 51.000 | 0.00021338 |
| 52.000 | 0.00021757 |
| 53.000 | 0.00022175 |
| 54.000 | 0.00022594 |
| 55.000 | 0.00023012 |
| 56.000 | 0.00023430 |
| 57.000 | 0.00023849 |
| 58.000 | 0.00024267 |
| 59.000 | 0.00024686 |
| kcal | GJ |
|---|---|
| 60.000 | 0.00025104 |
| 61.000 | 0.00025522 |
| 62.000 | 0.00025941 |
| 63.000 | 0.00026359 |
| 64.000 | 0.00026778 |
| 65.000 | 0.00027196 |
| 66.000 | 0.00027614 |
| 67.000 | 0.00028033 |
| 68.000 | 0.00028451 |
| 69.000 | 0.00028870 |
| 70.000 | 0.00029288 |
| 71.000 | 0.00029706 |
| 72.000 | 0.00030125 |
| 73.000 | 0.00030543 |
| 74.000 | 0.00030962 |
| 75.000 | 0.00031380 |
| 76.000 | 0.00031798 |
| 77.000 | 0.00032217 |
| 78.000 | 0.00032635 |
| 79.000 | 0.00033054 |
Kilocalories to Gigajoules Conversion
Converting Kilocalories (kcal) to Gigajoules (GJ) is a common energy and power conversion. 1 kcal equals 0.000004 GJ. For example, 100 kcal is equal to 0.000418 GJ.
Quick Mental Math: Kilocalories to Gigajoules
10000 kilocalories is 0.04184 gigajoules, so use that as the mental anchor.
Why is converting Kilocalories to Gigajoules tricky?
kilocalories to gigajoules is easy to botch because small calories and food Calories differ by a factor of 1,000.
Quick Reference Values
1 kcal = 0.000004 GJ. 5 kcal = 0.000021 GJ. 10 kcal = 0.000042 GJ. 25 kcal = 0.000105 GJ. 50 kcal = 0.000209 GJ. 100 kcal = 0.000418 GJ.
What is Kilocalories?
Kilocalories (kcal) is a unit of energy and power. A kilocalorie equals exactly 1,000 calories and represents the amount of energy needed to raise the temperature of 1 kilogram of water by 1 degree Celsius. It is widely used to quantify food energy and is equivalent to 4,184 joules [bipm-si-brochure]. The calorie was introduced in the early 19th century by Nicolas Clément as a unit of heat energy. The kilocalorie became standard in nutrition science by the early 20th century to express food energy content [bipm-si-brochure]. Kilocalories are used globally in nutrition labeling, especially in the US and Europe, to indicate energy content of foods. Scientific contexts often prefer joules, but kcal remains prevalent in dietetics [nist-sp-811].
What is Gigajoules?
Gigajoules (GJ) is a unit of energy and power. The gigajoule is a unit of energy equal to one billion joules (10⁹ J). One joule is the energy transferred when applying one newton of force over one meter, so a gigajoule represents a large energy quantity used in industrial and scientific applications [bipm-si-brochure]. The joule was defined in the 19th century and named after James Prescott Joule. The prefix 'giga-' was adopted internationally as part of SI prefixes in 1960 by the CGPM to denote a factor of 10⁹, formalizing the gigajoule as an SI derived unit [cgpm-resolutions]. Gigajoules are widely used in energy industries such as natural gas and electricity production, especially in Canada and Australia. They appear in energy statistics and engineering calculations per standards from BIPM and NIST [bipm-si-brochure][nist-sp-811].
Common Misspellings
People often search for this conversion using these alternate spellings: kilo calories, kcalorie, kilo-calories, giga joules, giga-joules, giga joule, gigajoule. All of these refer to the Kilocalories to Gigajoules conversion.