Once you know how many calories to eat, the next question is what those calories should be made of. That is what macros are about — and getting them roughly right makes a calorie target far more effective.
TL;DR — Enter a calorie target and pick a split in the macro calculator to see your daily grams of protein, carbs and fat.
What macros are
“Macros” is short for macronutrients: protein, carbohydrate and fat. They are the three things in food that supply calories. Protein and carbs each provide 4 calories per gram; fat provides 9. Splitting your calories among them shapes how you feel, perform and recover — not just how much you weigh.
Protein comes first
Across almost every goal, protein is the macro to anchor. It preserves muscle in a deficit, supports building in a surplus, and keeps you full. Set protein first based on your body weight, then divide the remaining calories between carbs and fat to taste.
Choosing a split
A balanced split works for most people. A lower-carb split can suit those who feel better on fewer carbs or are less active. A higher-protein split helps when building muscle or dieting hard. None is magic — they are different ways to arrange the same calories, so pick the one you can stick to.
Make it practical
Macro targets are a guide, not a straitjacket. Hitting protein and staying near your calories matters far more than nailing carbs and fat to the gram. Turn your calorie goal into a starting split with the macro calculator, then adjust based on how you feel and perform.