How to Calculate Your Macros: A Beginner-Friendly Guide
Macros — short for macronutrients — are the three nutrients that supply energy: protein, carbohydrate and fat. Counting macros means hitting target amounts of each, not just a calorie total. It is more work than counting calories alone, but it gives you better control over body composition, energy and hunger.
The energy in each macro
- Protein: 4 calories per gram — builds and protects muscle, keeps you full.
- Carbohydrate: 4 calories per gram — your body's main quick-access fuel.
- Fat: 9 calories per gram — essential for hormones and absorbing some vitamins.
Turning calories into macros
Start from your daily calorie target. Set protein first, because it is the priority — around 1.6 to 2.2 grams per kilogram of body weight if you are losing weight. Set a sensible fat floor of roughly 0.6 to 0.8 grams per kilogram for hormone health. Then fill the remaining calories with carbohydrates. Convert grams to calories using the values above to check it all adds up to your target.
A worked example
Suppose your target is 2,000 calories and you weigh 70 kg. Protein at about 1.8 g/kg is roughly 125 g, or 500 calories. Fat at about 0.7 g/kg is roughly 50 g, or 450 calories. That leaves 1,050 calories for carbohydrates, which at 4 calories per gram is about 260 g. Your macros would be roughly 125 g protein, 260 g carbs and 50 g fat.
Do the exact ratios matter?
Total calories drive weight change, and protein drives muscle retention — those two matter most. The carb-to-fat split is largely about personal preference, energy and what keeps you satisfied. There is no single magic ratio, so choose the one you can stick to.
Is counting macros necessary?
Not for everyone. Many people do well simply eating enough protein and watching portions. Macro counting suits those who want precise control or have specific physique goals. Try the simpler approach first and only add detail if you need it.
The bottom line
Calculating macros means setting protein first, fat to a healthy floor, and carbs to fill the rest of your calorie target — using 4, 4 and 9 calories per gram to make it balance. It gives you finer control than calories alone, but only if it is sustainable for you. Our free macro calculator does the maths so you can focus on the food.