Macro Calculator — Protein, Carbs & Fat Targets
By ToolZoneX Team
•
August 2026
Total calories matter, but the mix of protein, carbs, and fat ("macros") shapes results like muscle retention during a cut or muscle gain during a bulk. This calculator turns your calorie target into grams for a balanced, high-protein, low-carb, or keto split.
How to Use Macro Calculator
1.
Enter your age, gender, height, and weight2.
Select your activity level and goal (lose, maintain, gain)3.
Pick a diet style to see your protein, carb, and fat grams
Key Features
- Based on the Mifflin-St Jeor equation
- Four diet style presets including keto
- Visual macro breakdown by percentage and grams
When to Use This Tool
•
Setting daily macro targets for tracking apps•
Comparing keto, low-carb, and high-protein splits•
Planning meals around a specific macro target
Frequently Asked Questions
"Macros" is short for macronutrients — protein, carbohydrates, and fat, the nutrient groups that provide calories, as opposed to micronutrients like vitamins and minerals.
Fat is more energy-dense than protein or carbs — about 9 kcal/gram vs. 4 kcal/gram — so the same calories convert to fewer grams of fat.
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