Conversion

Grams to Calories Converter

Convert macro grams to energy (kcal).

Grams

Macro

Calculated Output

Energy (kcal) 400

Formula: calories = grams × kcal per gram

Step-by-Step Breakdown

1. Values used:

2. Grams = 100

3. Macro = 4

5. Energy = Grams x Macro = 100 x 4 = 400kcal

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The math behind it

kcal = grams × energy density: carbs/protein 4 kcal/g, fat 9 kcal/g.

100 g carbs → 400 kcal.

Alcohol?

7 kcal/g — use the 'Fat' selector and adjust.