Convert kilocalories to megajoules
1 kcal = 0.004184 MJ — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.004 184MJ
Exact decimal: 0.004184
As a fraction: 523/125000
1 kcal = 0.004184 MJ
How to convert kilocalories to megajoules
Multiply the number of kilocalories by 0.004184 to get megajoules.
The exact factor is 0.004184 — as a fraction, 523/125000.
Kilocalorie: The Calorie on food labels — 1000 small calories.
Kilocalorie to Megajoule conversion table
| Kilocalories (kcal) | Megajoules (MJ) |
|---|---|
| 1 kcal | 0.004 184 |
| 2 kcal | 0.008 368 |
| 3 kcal | 0.012 552 |
| 5 kcal | 0.020 92 |
| 10 kcal | 0.041 84 |
| 20 kcal | 0.083 68 |
| 25 kcal | 0.1046 |
| 50 kcal | 0.2092 |
| 100 kcal | 0.4184 |
| 250 kcal | 1.046 |
| 500 kcal | 2.092 |
| 1000 kcal | 4.184 |
Megajoule to Kilocalorie conversion table
| Megajoules (MJ) | Kilocalories (kcal) |
|---|---|
| 1 MJ | 239.005 74 |
| 2 MJ | 478.011 47 |
| 3 MJ | 717.017 21 |
| 5 MJ | 1195.0287 |
| 10 MJ | 2390.0574 |
| 20 MJ | 4780.1147 |
| 25 MJ | 5975.1434 |
| 50 MJ | 11 950.287 |
| 100 MJ | 23 900.574 |
| 250 MJ | 59 751.434 |
| 500 MJ | 119 502.87 |
| 1000 MJ | 239 005.74 |
Frequently asked
How many megajoules are in a kilocalorie?
One kilocalorie equals 0.004184 megajoules (kcal → MJ). That figure is exact, not rounded.
How do you convert kilocalories to megajoules?
Multiply the number of kilocalories by 0.004184 to get megajoules.
What is 1 MJ in kilocalories?
One megajoule is 239.0057361 kilocalories.
What is 10 kcal in MJ?
10 kcal = 0.041 84 MJ.
What exactly is a kilocalorie?
The Calorie on food labels — 1000 small calories.