How to convert kcal to kJ
- Type the value in kcal in the Value field.
- See the result in kJ, highlighted at the top.
- You also see the same value in the other units of the category.
- Tap Copy result to take the equivalents with you.
The formula and examples
1 kcal equals 4.184 kJ, and 1 kJ equals 0.23901 kcal. To convert, multiply the kcal value by 4.184: 100 kcal is 418.4 kJ, 250 kcal is 1046 kJ and 2000 kcal is 8368 kJ.
On food labels: multiply kcal by 4.184 to get kJ. A food kilocalorie is a “large calorie” (1,000 small calories).
kcal × 4.184 = kJ
kJ × 0.23900574 = kcal
Kilocalories (kcal) to Kilojoules (kJ) conversion table
| Kilocalories (kcal) | Kilojoules (kJ) |
|---|---|
| 0.5 | 2.092 |
| 1 | 4.184 |
| 2 | 8.368 |
| 3 | 12.552 |
| 4 | 16.736 |
| 5 | 20.92 |
| 6 | 25.104 |
| 7 | 29.288 |
| 8 | 33.472 |
| 9 | 37.656 |
| 10 | 41.84 |
| 11 | 46.024 |
| 12 | 50.208 |
| 14 | 58.576 |
| 15 | 62.76 |
| 16 | 66.944 |
| 18 | 75.312 |
| 20 | 83.68 |
| 21.1 | 88.2824 |
| 25 | 104.6 |
| 30 | 125.52 |
| 35 | 146.44 |
| 40 | 167.36 |
| 42.195 | 176.544 |
| 45 | 188.28 |
| 50 | 209.2 |
| 55 | 230.12 |
| 60 | 251.04 |
| 65 | 271.96 |
| 70 | 292.88 |
| 75 | 313.8 |
| 80 | 334.72 |
| 90 | 376.56 |
| 100 | 418.4 |
| 110 | 460.24 |
| 120 | 502.08 |
| 125 | 523 |
| 130 | 543.92 |
| 140 | 585.76 |
| 150 | 627.6 |
| 160 | 669.44 |
| 170 | 711.28 |
| 175 | 732.2 |
| 180 | 753.12 |
| 190 | 794.96 |
| 200 | 836.8 |
| 250 | 1,046 |
| 300 | 1,255.2 |
| 400 | 1,673.6 |
| 500 | 2,092 |
| 750 | 3,138 |
| 1,000 | 4,184 |
Kilojoules (kJ) to Kilocalories (kcal) conversion table
| Kilojoules (kJ) | Kilocalories (kcal) |
|---|---|
| 0.5 | 0.119503 |
| 1 | 0.239006 |
| 2 | 0.478011 |
| 3 | 0.717017 |
| 4 | 0.956023 |
| 5 | 1.19503 |
| 6 | 1.43403 |
| 7 | 1.67304 |
| 8 | 1.91205 |
| 9 | 2.15105 |
| 10 | 2.39006 |
| 11 | 2.62906 |
| 12 | 2.86807 |
| 14 | 3.34608 |
| 15 | 3.58509 |
| 16 | 3.82409 |
| 18 | 4.3021 |
| 20 | 4.78011 |
| 21.1 | 5.04302 |
| 25 | 5.97514 |
| 30 | 7.17017 |
| 35 | 8.3652 |
| 40 | 9.56023 |
| 42.195 | 10.0848 |
| 45 | 10.7553 |
| 50 | 11.9503 |
| 55 | 13.1453 |
| 60 | 14.3403 |
| 65 | 15.5354 |
| 70 | 16.7304 |
| 75 | 17.9254 |
| 80 | 19.1205 |
| 90 | 21.5105 |
| 100 | 23.9006 |
| 110 | 26.2906 |
| 120 | 28.6807 |
| 125 | 29.8757 |
| 130 | 31.0707 |
| 140 | 33.4608 |
| 150 | 35.8509 |
| 160 | 38.2409 |
| 170 | 40.631 |
| 175 | 41.826 |
| 180 | 43.021 |
| 190 | 45.4111 |
| 200 | 47.8011 |
| 250 | 59.7514 |
| 300 | 71.7017 |
| 400 | 95.6023 |
| 500 | 119.503 |
| 750 | 179.254 |
| 1,000 | 239.006 |
Good to know
- The factor is 4.184 kJ for every kcal.
- The result is rounded to 8 significant digits.
- Below you will find a conversion chart in both directions.
Frequently asked questions
How much is 100 kcal in kJ?
418.4 kJ.
How much is 250 kcal in kJ?
1046 kJ.
How many kcal are in 1 kJ?
0.23901 kcal.
How do I convert kcal to kJ in my head?
On food labels: multiply kcal by 4.184 to get kJ.