Grams to Calories Calculator

Your details

Forward mode converts grams into kilocalories. Reverse mode starts from a calorie target and tells you how many grams of one chosen macronutrient that equals.
Total carbohydrate grams, including sugars but NOT fiber (enter fiber separately).
g
Grams of dietary protein.
g
Grams of total fat (saturated + unsaturated).
g
Grams of dietary fiber. Fiber contributes roughly 2 kcal/g in most scientific models (some US labels use 0).
g
Grams of pure ethanol. Multiply a drink's volume (mL) by ABV (%) by 0.789 to get grams.
g
Total Calories
465kcal

Sum of all macronutrient calories

Calories from Carbs200kcal
Calories from Protein120kcal
Calories from Fat135kcal
Calories from Fiber10kcal
Calories from Alcohol0kcal

These macros add up to 465 kcal.

  • Carbohydrates contribute 43% (200 kcal).
  • Protein contributes 26% (120 kcal).
  • Fat contributes 29% (135 kcal) - fat is calorie-dense at 9 kcal/g.
  • Fiber adds 10 kcal at the scientific 2 kcal/g rate (US food labels often show 0 for fiber).

Next stepCompare these numbers against your daily calorie target to see how this meal or food fits your goals.

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