Calories to Kilojoules (cal → kJ)
Formula
1 cal = 0.004184 kJConversion Table
| cal | kJ |
|---|---|
| 0 | 0 |
| 1.0000 | 0.0041840 |
| 2.0000 | 0.0083680 |
| 3.0000 | 0.012552 |
| 4.0000 | 0.016736 |
| 5.0000 | 0.020920 |
| 6.0000 | 0.025104 |
| 7.0000 | 0.029288 |
| 8.0000 | 0.033472 |
| 9.0000 | 0.037656 |
| 10.000 | 0.041840 |
| 11.000 | 0.046024 |
| 12.000 | 0.050208 |
| 13.000 | 0.054392 |
| 14.000 | 0.058576 |
| 15.000 | 0.062760 |
| 16.000 | 0.066944 |
| 17.000 | 0.071128 |
| 18.000 | 0.075312 |
| 19.000 | 0.079496 |
| cal | kJ |
|---|---|
| 20.000 | 0.083680 |
| 21.000 | 0.087864 |
| 22.000 | 0.092048 |
| 23.000 | 0.096232 |
| 24.000 | 0.10042 |
| 25.000 | 0.10460 |
| 26.000 | 0.10878 |
| 27.000 | 0.11297 |
| 28.000 | 0.11715 |
| 29.000 | 0.12134 |
| 30.000 | 0.12552 |
| 31.000 | 0.12970 |
| 32.000 | 0.13389 |
| 33.000 | 0.13807 |
| 34.000 | 0.14226 |
| 35.000 | 0.14644 |
| 36.000 | 0.15062 |
| 37.000 | 0.15481 |
| 38.000 | 0.15899 |
| 39.000 | 0.16318 |
| cal | kJ |
|---|---|
| 40.000 | 0.16736 |
| 41.000 | 0.17154 |
| 42.000 | 0.17573 |
| 43.000 | 0.17991 |
| 44.000 | 0.18410 |
| 45.000 | 0.18828 |
| 46.000 | 0.19246 |
| 47.000 | 0.19665 |
| 48.000 | 0.20083 |
| 49.000 | 0.20502 |
| 50.000 | 0.20920 |
| 51.000 | 0.21338 |
| 52.000 | 0.21757 |
| 53.000 | 0.22175 |
| 54.000 | 0.22594 |
| 55.000 | 0.23012 |
| 56.000 | 0.23430 |
| 57.000 | 0.23849 |
| 58.000 | 0.24267 |
| 59.000 | 0.24686 |
| cal | kJ |
|---|---|
| 60.000 | 0.25104 |
| 61.000 | 0.25522 |
| 62.000 | 0.25941 |
| 63.000 | 0.26359 |
| 64.000 | 0.26778 |
| 65.000 | 0.27196 |
| 66.000 | 0.27614 |
| 67.000 | 0.28033 |
| 68.000 | 0.28451 |
| 69.000 | 0.28870 |
| 70.000 | 0.29288 |
| 71.000 | 0.29706 |
| 72.000 | 0.30125 |
| 73.000 | 0.30543 |
| 74.000 | 0.30962 |
| 75.000 | 0.31380 |
| 76.000 | 0.31798 |
| 77.000 | 0.32217 |
| 78.000 | 0.32635 |
| 79.000 | 0.33054 |
Calories to Kilojoules Conversion
Converting Calories (cal) to Kilojoules (kJ) is a common energy and power conversion. 1 cal equals 0.004184 kJ. For example, 100 cal is equal to 0.4184 kJ.
Quick Mental Math: Calories to Kilojoules
Reference a unit table to convert calories to kilojoules.
Why is converting Calories to Kilojoules tricky?
No direct formula connects calories and kilojoules.
Quick Reference Values
1 cal = 0.004184 kJ. 5 cal = 0.02092 kJ. 10 cal = 0.04184 kJ. 25 cal = 0.1046 kJ. 50 cal = 0.2092 kJ. 100 cal = 0.4184 kJ.
What is Calories?
Calories (cal) is a unit of energy and power. The calorie (cal) is defined as exactly 4.184 joules. It quantifies the energy needed to raise the temperature of one gram of water by 1°C under standard conditions. The calorie is widely used in chemistry and nutrition to express energy content [bipm-si-brochure]. The calorie was introduced in the early 19th century by Nicolas Clément and standardized internationally in the 20th century. It was adopted for practical energy measurement in chemistry and food science before the joule became the SI unit [bipm-si-brochure]. Calories remain common in food labeling, nutrition, and chemistry worldwide. The dietary Calorie (kcal) is prevalent in the US, Europe, and many countries while scientific contexts prefer the joule [bipm-si-brochure].
What is Kilojoules?
Kilojoules (kJ) is a unit of energy and power. A kilojoule is a unit of energy equal to 1,000 joules. It quantifies work, heat, or energy transfer in the metric system, with one joule defined as one newton meter. Kilojoules are widely applied in physics, chemistry, and nutrition to measure energy content or expenditure [iso-80000]. The joule unit was named after James Prescott Joule in the late 19th century, reflecting mechanical equivalent of heat measurements. The kilojoule, as a multiple, became common with SI adoption to express larger energy quantities clearly and is standardized by ISO and BIPM [bipm-si-brochure]. Kilojoules are standard in scientific disciplines globally for energy quantification. Nutrition labels in many countries use kilojoules to indicate food energy content, while engineering and physics consistently apply kJ for energy calculations [nist-si-guide].
Common Misspellings
People often search for this conversion using these alternate spellings: calorie, cal, calory, calo, kilojoule, kilo joules, kilojouls, kilojoules energy, kj. All of these refer to the Calories to Kilojoules conversion.