🥗Macronutrient Calculator

Macro Calculator — convert calories to grams

You already know your daily calorie target, but not sure how many grams of protein, fat, and carbs that translates to? Our macro calculator solves this in seconds. Enter your calorie count, pick a preset ratio, or set your own percentages — the calculator instantly shows results in both kilocalories and grams, complete with a visual proportion bar.

How to choose the right macro split for your goal?

There is no one-size-fits-all macro split. A balanced ratio (30/30/40) is a good starting point for active people without a specific body composition goal. Low-carb (40/40/20) works well for fat loss and improving insulin sensitivity. High-protein (40/30/30) is popular for muscle building — higher protein intake protects muscle mass during a deficit and supports anabolism. If none of the presets suit you, use the custom option and enter any percentages that add up to 100. Remember that the figures are indicative — for optimal macro planning, consult a dietitian.

Frequently asked questions

What are macronutrients and why do they matter?

Macronutrients are protein, fat, and carbohydrates — the three main nutrients that provide energy. The right ratio depends on your goal: cutting, muscle building, or maintenance each require different proportions. This calculator quickly converts a calorie target into grams of each macro.

How many calories are in 1 gram of protein, fat, and carbs?

Protein and carbohydrates each provide 4 kcal per gram. Fat is more calorie-dense at 9 kcal per gram. The calculator uses these conversion factors to work out the grams of each macronutrient from your calorie total.

What macro split is best for fat loss?

Low-carb splits (e.g. 40% protein / 40% fat / 20% carbs) or high-protein splits are popular for fat loss because protein helps preserve muscle mass during a calorie deficit. The optimal split ultimately depends on individual preferences, activity level, and a dietitian's guidance.

How do I use this calculator with a calorie calculator?

First, calculate your daily calorie needs (TDEE) in a calorie calculator. Then enter that number here and choose the macro ratio that matches your goal — cutting, bulking, or maintenance. The result will show the grams of protein, fat, and carbs to eat each day.