Macronutrient Calorie Calculator

By | February 13, 2004

macronutrient calorie calculator

Use this Macronutrient calorie calculator to compute the amount and percentage of calories of protein, carbohydrates, and fat in your foods – with a graphical display.

Do you know how much fat is in your food? How about the ratio of carbohydrate? This tool will tell you.

Macronutrient Calorie Calculator

Protein (g)
Carbohydrate (g)
Fat (g)
Pro Carb Fat

How to Use this Tool

Use this tool to visually understand the breakdown of food items. By simply keying in the amount of protein, fat, and carbohydrate from the nutrition label, and you will be given the breakdown by percentage of calories for each macronutrient.

This may surprise you – because one gram of fat has twice as many calories as protein or carbohydrate, often a food that appears to be lower in fat may actually be 50% fat or more! Nutrition labels often advertise “low fat” by comparing weight instead of calories.

Most food labels now label calories from fat, but no labels include calories from protein or calories from carbs. This macronutrient calorie calculator can do that for you. Just enter the fat grams, the protein grams, and the carb grams from any food label and it will tell you the calories of each.

Macronutrient Calorie Breakdown

Here’s how many calories are in each of the 3 macronutrients.

  • Carbs = 4 calories per gram
  • Protein = 4 calorie per gram
  • Fat = 9 calories per gram

Note: When calculating carbohydrates always subtract the fiber grams from the total carbohydrate grams. Fiber is a carbohydrate but does not contain calories because it is indigestible.