How to use this chart
Find your calories (kcal) in the first column and read across for kilojoules (kJ). Every result is kcal × 4.184. Need a value that is not listed? Use the calories to kJ converter.
1 to 10 kcal
| Calories (kcal) | Kilojoules (kJ) | Joules (J) |
|---|---|---|
| 1 kcal | 4.184 kJ | 4,184 J |
| 2 kcal | 8.368 kJ | 8,368 J |
| 3 kcal | 12.552 kJ | 12,552 J |
| 4 kcal | 16.736 kJ | 16,736 J |
| 5 kcal | 20.92 kJ | 20,920 J |
| 6 kcal | 25.104 kJ | 25,104 J |
| 7 kcal | 29.288 kJ | 29,288 J |
| 8 kcal | 33.472 kJ | 33,472 J |
| 9 kcal | 37.656 kJ | 37,656 J |
| 10 kcal | 41.84 kJ | 41,840 J |
20 to 100 kcal
150 to 1,000 kcal
| Calories (kcal) | Kilojoules (kJ) | Joules (J) |
|---|---|---|
| 150 kcal | 627.6 kJ | 627,600 J |
| 200 kcal | 836.8 kJ | 836,800 J |
| 250 kcal | 1,046 kJ | 1,046,000 J |
| 300 kcal | 1,255.2 kJ | 1,255,200 J |
| 350 kcal | 1,464.4 kJ | 1,464,400 J |
| 400 kcal | 1,673.6 kJ | 1,673,600 J |
| 450 kcal | 1,882.8 kJ | 1,882,800 J |
| 500 kcal | 2,092 kJ | 2,092,000 J |
| 600 kcal | 2,510.4 kJ | 2,510,400 J |
| 700 kcal | 2,928.8 kJ | 2,928,800 J |
| 800 kcal | 3,347.2 kJ | 3,347,200 J |
| 900 kcal | 3,765.6 kJ | 3,765,600 J |
| 1,000 kcal | 4,184 kJ | 4,184,000 J |
1,200 to 5,000 kcal
| Calories (kcal) | Kilojoules (kJ) | Joules (J) |
|---|---|---|
| 1,200 kcal | 5,020.8 kJ | 5,020,800 J |
| 1,400 kcal | 5,857.6 kJ | 5,857,600 J |
| 1,500 kcal | 6,276 kJ | 6,276,000 J |
| 1,600 kcal | 6,694.4 kJ | 6,694,400 J |
| 1,800 kcal | 7,531.2 kJ | 7,531,200 J |
| 2,000 kcal | 8,368 kJ | 8,368,000 J |
| 2,200 kcal | 9,204.8 kJ | 9,204,800 J |
| 2,400 kcal | 10,041.6 kJ | 10,041,600 J |
| 2,500 kcal | 10,460 kJ | 10,460,000 J |
| 2,600 kcal | 10,878.4 kJ | 10,878,400 J |
| 2,800 kcal | 11,715.2 kJ | 11,715,200 J |
| 3,000 kcal | 12,552 kJ | 12,552,000 J |
| 3,500 kcal | 14,644 kJ | 14,644,000 J |
| 4,000 kcal | 16,736 kJ | 16,736,000 J |
| 4,500 kcal | 18,828 kJ | 18,828,000 J |
| 5,000 kcal | 20,920 kJ | 20,920,000 J |
How to read the calories to kJ table
The first column shows kilocalories (kcal), the "calories" on food labels and diet apps. The middle column shows the equivalent kilojoules. The last column shows joules for anyone who needs the base SI unit. Each row is exactly the calories multiplied by 4.184, so you can extend the table yourself.
Quick reference points
- 100 kcal = 418.4 kJ
- 500 kcal = 2,092 kJ
- 1,000 kcal = 4,184 kJ
- 2,000 kcal = 8,368 kJ, the 2,000 kcal reference on many diet labels
To go from kJ to calories, use the kJ to calories chart.
Frequently asked questions
How many kJ is 2,000 calories?
2,000 calories (kcal) is 8,368 kJ.
What is the calories to kJ conversion factor?
Multiply calories (kcal) by 4.184 to get kilojoules.
Last updated 11 Oct 2026. How we calculate.