Kilojoule to Calorie Converter
Energy · unit-converter
Convert Kilojoule to Calorie with fixed input and output units, a step-by-step formula line, and reference tables. Factors are joule-based; food energy uses thermochemical calories. The full Energy Converter also includes MMBtu, toe, thermal kWh, and MeV/GeV.
Calculator
From: Kilojoule (kj)
To: Calorie (cal)
About Kilojoule
One kilojoule is 1,000 J. Scientific and engineering contexts often use kJ alongside joules.
About Calorie
The small calorie (cal) is 4.184 J in this converter (thermochemical). Do not confuse with the dietary kilocalorie (kcal).
How to convert kilojoules to calories
1 kilojoule is equal to 239.0057361376673 calorie when both are expressed in joule-equivalents:
1 kj = (1,000 J ÷ 4.184 J) cal = 239.0057361376673 cal
Each kilojoule is defined as 1,000 J and each calorie as 4.184 J in this tool, so one kj equals 1,000 ÷ 4.184 cal = 239.0057361376673 cal.
Let d(kj) be the numeric amount in Kilojoule (kj), and d(cal) the amount in Calorie (cal). Then:
d(cal) = d(kj) × (1,000 / 4.184)
Equivalently, divide by how many kj fit into one cal (joules per cal divided by joules per kj):
d(cal) = d(kj) ÷ 0.004184
Or: calorie = kilojoule ÷ 0.004184
Examples
Example #1: Convert 1 kj to calorie
1 kj = 1 kj × (1,000/4.184) cal = 239.005736138 cal
1 kj = 1 kj ÷ 0.004184 = 239.005736138 cal
Example #2: Convert 10 kj to calorie
10 kj = 10 kj × (1,000/4.184) cal = 2390.05736138 cal
10 kj = 10 kj ÷ 0.004184 = 2390.05736138 cal
Summary
To convert Kilojoule to Calorie, multiply the value in kj by the ratio of joules per kj divided by joules per cal. Equivalently: value_cal = value_kj × (1000 / 4.184). Numerically, 1 kj equals 239.0057361376673 cal.
Relationship context
You are converting between SI energy (joules) (Kilojoules) and food / nutrition energy (calories) (Calories). All values are mapped through joules first. The numeric factor is 2.390057e+2.
Conversion tables
| Kilojoule (kj) | Calorie (cal) |
|---|---|
| 0.1 | 23.9005736138 |
| 1 | 239.005736138 |
| 2 | 478.011472275 |
| 3 | 717.017208413 |
| 4 | 956.022944551 |
| 5 | 1,195.02868069 |
| 6 | 1,434.03441683 |
| 7 | 1,673.04015296 |
| 8 | 1,912.0458891 |
| 9 | 2,151.05162524 |
| Kilojoule (kj) | Calorie (cal) |
|---|---|
| 10 | 2,390.05736138 |
| 20 | 4,780.11472275 |
| 30 | 7,170.17208413 |
| 40 | 9,560.22944551 |
| 50 | 11,950.2868069 |
| 60 | 14,340.3441683 |
| 70 | 16,730.4015296 |
| 80 | 19,120.458891 |
| 90 | 21,510.5162524 |
| 100 | 23,900.5736138 |