Grams to kilocalories
Type a value in g to get it in kcal instantly.
400kcal
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: kcal 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 kcal
kcal = grams × 4 (protein, carbs), × 9 (fat), × 7 (alcohol); kJ = kcal × 4.184.
Example: 100 g = 400 kcal.
Grams on this page are protein (4 kcal/g). Pick another nutrient above.
Every unit
That food energy in every unit
Tables
g to kcal conversion table
| g | kcal |
|---|---|
| 1 g | 4 kcal |
| 5 g | 20 kcal |
| 10 g | 40 kcal |
| 15 g | 60 kcal |
| 20 g | 80 kcal |
| 25 g | 100 kcal |
| 30 g | 120 kcal |
| 40 g | 160 kcal |
| 50 g | 200 kcal |
| 75 g | 300 kcal |
| 100 g | 400 kcal |
| 150 g | 600 kcal |
| 200 g | 800 kcal |
kcal to g conversion table
| kcal | g |
|---|---|
| 4 kcal | 1 g |
| 20 kcal | 5 g |
| 40 kcal | 10 g |
| 60 kcal | 15 g |
| 80 kcal | 20 g |
| 100 kcal | 25 g |
| 120 kcal | 30 g |
| 160 kcal | 40 g |
| 200 kcal | 50 g |
| 300 kcal | 75 g |
| 400 kcal | 100 g |
| 600 kcal | 150 g |
| 800 kcal | 200 g |
Quick answers
Quick answers
- How many kcal is 1 g?
- 1 g is 4 kcal.
- How many kcal is 10 g?
- 10 g is 40 kcal.
- How many kcal is 100 g?
- 100 g is 400 kcal.
The units
About these units
Grams (g)
Grams of the chosen nutrient.
Kilocalories (kcal)
Food Calories, as on labels.
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