Grams Carbs to Calories Converter
Instantly convert grams of carbohydrate into calories using standard nutrition science, and see how it compares to protein and fat.
Convert Your Carb Grams
Enter the amount of carbohydrate in grams below to get an instant, precise conversion to calories, based on standard nutrition science energy values.
Carbs Converter
Enter grams of carbohydrate to see the calorie equivalent
Enter the carbohydrate figure as shown on a nutrition label or recipe
Most food labels and dietary guidelines use the standard 4 kcal/g figure
Converted Calories
Based on standard nutrition science values
Carbs to Calories Reference Chart
Standard conversions using the rounded 4 calories per gram figure, for quick lookup.
| Grams of Carbs | Calories | Equivalent in Protein Grams | Equivalent in Fat Grams |
|---|---|---|---|
| 10g | 40 kcal | 10g | 4.4g |
| 25g | 100 kcal | 25g | 11.1g |
| 50g | 200 kcal | 50g | 22.2g |
| 75g | 300 kcal | 75g | 33.3g |
| 100g | 400 kcal | 100g | 44.4g |
| 150g | 600 kcal | 150g | 66.7g |
Carbs to Calories FAQ
Everything you need to know about converting carbohydrate grams into calories.
One gram of carbohydrate provides approximately 4 calories. This is a standard nutrition science conversion figure used on food labels and in dietary calculations worldwide.
To convert grams of carbohydrate to calories, multiply the number of grams by 4. For example, 50 grams of carbohydrate equals 200 calories, since 50 multiplied by 4 is 200.
No. Carbohydrates and protein both provide around 4 calories per gram, while fat provides about 9 calories per gram, more than double. This is why high-fat foods tend to be more calorie-dense than high-carb foods of the same weight.
Some food labels use more precise Atwater factors that vary slightly by food type, rather than the rounded 4 calories per gram figure. This can cause small differences between a manual calculation and the calorie total printed on packaging.