Health & Fitness
Macro Calculator
Use this macro calculator to turn a calorie target into protein, fat, and carb grams.
Protein target
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- Fat
- —
- Carbs
- —
Student quick launch
Grade planning, algebra checks, and formulas students reach for most.
Study path
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What the macro calculator solves
Use this macro calculator to turn a calorie target into protein, fat, and carb grams.
Formula
How to use it
- Enter daily calories.
- Enter body weight.
- Choose a goal preset.
How to read the answer
Protein and fat are set first; carbohydrates receive the remaining calories.
Common mistakes and edge cases
- Macros do not guarantee diet quality.
- Protein needs vary by training and health.
- Carb targets can be adjusted for preference and sport.
Worked examples
Balanced target
Protein target
128 g
Muscle gain target
Protein target
180 g
Frequently asked questions
How many calories are in each macro?+
Protein and carbs have about 4 calories per gram. Fat has about 9 calories per gram.
Should macros be exact?+
No. They are targets; consistency over time matters more than exact daily perfection.
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Last updated: May 8, 2026