Megajoule to Kilocalorie Converter
Energy · unit-converter
Convert Megajoule to Kilocalorie 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: Megajoule (mj)
To: Kilocalorie (kcal)
About Megajoule
One megajoule is 1,000,000 J. It is common in fuel-content and engineering thermal calculations.
About Kilocalorie
The kilocalorie (kcal) is 1,000 calories in the nutrition sense—often labeled “Calorie” on food packaging. Here 1 kcal = 4,184 J (thermochemical calorie definition used in this tool).
How to convert megajoules to kilocalories
1 megajoule is equal to 239.0057361376673 kilocalorie when both are expressed in joule-equivalents:
1 mj = (1,000,000 J ÷ 4,184 J) kcal = 239.0057361376673 kcal
Each megajoule is defined as 1,000,000 J and each kilocalorie as 4,184 J in this tool, so one mj equals 1,000,000 ÷ 4,184 kcal = 239.0057361376673 kcal.
Let d(mj) be the numeric amount in Megajoule (mj), and d(kcal) the amount in Kilocalorie (kcal). Then:
d(kcal) = d(mj) × (1,000,000 / 4,184)
Equivalently, divide by how many mj fit into one kcal (joules per kcal divided by joules per mj):
d(kcal) = d(mj) ÷ 0.004184
Or: kilocalorie = megajoule ÷ 0.004184
Examples
Example #1: Convert 1 mj to kilocalorie
1 mj = 1 mj × (1,000,000/4,184) kcal = 239.005736138 kcal
1 mj = 1 mj ÷ 0.004184 = 239.005736138 kcal
Example #2: Convert 10 mj to kilocalorie
10 mj = 10 mj × (1,000,000/4,184) kcal = 2390.05736138 kcal
10 mj = 10 mj ÷ 0.004184 = 2390.05736138 kcal
Summary
To convert Megajoule to Kilocalorie, multiply the value in mj by the ratio of joules per mj divided by joules per kcal. Equivalently: value_kcal = value_mj × (1000000 / 4184). Numerically, 1 mj equals 239.0057361376673 kcal.
Relationship context
You are converting between SI energy (joules) (Megajoules) and food / nutrition energy (calories) (Kilocalories). All values are mapped through joules first. The numeric factor is 2.390057e+2.
Conversion tables
| Megajoule (mj) | Kilocalorie (kcal) |
|---|---|
| 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 |
| Megajoule (mj) | Kilocalorie (kcal) |
|---|---|
| 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 |