Grams to kilojoules
Type a value in g to get it in kJ instantly.
1,673.6kJ
That's 2× as much energy as a snack, while a meal is 1.5× more. That is 20 % of a 2,000 kcal day.
Convert the other way: kJ to g
What it means
How much energy is that?
Atwater factors as used on food labels. Real foods vary a little, and fibre is often counted at 2 kcal/g or not at all.
The math
How to convert g to kJ
kcal = grams × 4 (protein, carbs), × 9 (fat), × 7 (alcohol); kJ = kcal × 4.184.
Example: 100 g = 1,673.6 kJ.
Grams on this page are protein (4 kcal/g). Pick another nutrient above.
Every unit
That food energy in every unit
Tables
g to kJ conversion table
| g | kJ |
|---|---|
| 1 g | 16.736 kJ |
| 5 g | 83.68 kJ |
| 10 g | 167.36 kJ |
| 15 g | 251.04 kJ |
| 20 g | 334.72 kJ |
| 25 g | 418.4 kJ |
| 30 g | 502.08 kJ |
| 40 g | 669.44 kJ |
| 50 g | 836.8 kJ |
| 75 g | 1,255.2 kJ |
| 100 g | 1,673.6 kJ |
| 150 g | 2,510.4 kJ |
| 200 g | 3,347.2 kJ |
kJ to g conversion table
| kJ | g |
|---|---|
| 16.7 kJ | 0.997849 g |
| 83.7 kJ | 5.0012 g |
| 167 kJ | 9.97849 g |
| 251 kJ | 14.9976 g |
| 335 kJ | 20.0167 g |
| 418 kJ | 24.9761 g |
| 502 kJ | 29.9952 g |
| 669 kJ | 39.9737 g |
| 837 kJ | 50.012 g |
| 1,260 kJ | 75.2868 g |
| 1,670 kJ | 99.7849 g |
| 2,510 kJ | 149.976 g |
| 3,350 kJ | 200.167 g |
Quick answers
Quick answers
- How many kJ is 1 g?
- 1 g is 16.736 kJ.
- How many kJ is 10 g?
- 10 g is 167.36 kJ.
- How many kJ is 100 g?
- 100 g is 1,673.6 kJ.
The units
About these units
Grams (g)
Grams of the chosen nutrient.
Kilojoules (kJ)
Food energy in kJ, as on European and Australian labels.
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