Uses the thermochemical calorie of 4.184 J exactly. Food labels worldwide use the kilocalorie, so a label reading 250 calories means 250 kcal, or 1,046 kJ.
| kcal | kJ | kJ | kcal |
|---|---|---|---|
| 100 | 418.4 | 100 | 23.9 |
| 250 | 1046 | 500 | 119.5 |
| 500 | 2092 | 1000 | 239 |
| 1000 | 4184 | 2000 | 478 |
| 1500 | 6276 | 4184 | 1000 |
| 2000 | 8368 | 8368 | 2000 |
| 2500 | 10460 | 10000 | 2390.1 |
| 3000 | 12552 | 12000 | 2868.1 |