How do I calculate my macros?

In three steps: first find your daily calorie target (your TDEE, adjusted for your goal), then choose a macro split like 30% protein, 40% carbs and 30% fat, and finally convert each percentage to grams. Protein and carbs have 4 calories per gram and fat has 9. Our macro calculator does all three steps automatically.

What is a good macro split?

Balanced (30% protein, 40% carbs, 30% fat) works for most people. High-protein (40/40/20) suits muscle building and weight loss. Low-carb (40/20/40) suits those who prefer fewer carbs. The best split is the one you can stick to that hits your protein needs.

How many grams of protein, carbs and fat do I need?

It depends on your calories and split. For example, on 2,000 calories with a balanced split, that is around 150g protein, 200g carbs and 67g fat. Use a macro calculator to get exact grams for your own calorie target and chosen split.

Do I need to hit my macros exactly?

No. Aim to get reasonably close, within 5 to 10 grams, rather than obsessing over exact numbers. Protein is the most worth prioritising; carbs and fat can flex more day to day as long as your total calories are roughly on target.

Should I count calories or macros?

Macros include calories, since they are what calories are made of, but tracking macros gives you more control over body composition. If that feels like too much, start by tracking calories and protein, then add carbs and fat later if you want more precision.

How do I calculate macros for weight loss?

Start from a calorie deficit (below your TDEE), then apply a higher-protein split like 40/40/20 to preserve muscle and control hunger. The deficit drives weight loss; the high protein makes it more comfortable and muscle-sparing.

How to Calculate Your Macros (Step by Step)

“Calculating your macros” sounds technical, but it is really just three simple steps: find your calories, choose a split, and turn it into grams. Here is exactly how to do it, with a worked example, so you can set targets that actually match your goal.

The short answerTo calculate macros: (1) find your daily calories, (2) choose a split like 30% protein / 40% carbs / 30% fat, (3) convert to grams, protein and carbs are 4 calories per gram, fat is 9. Our macro calculator does all three instantly.

Step 1: Find your calories

Everything starts with your daily calorie target. This is your TDEE (total daily energy expenditure), adjusted for your goal:

Maintain: eat at your TDEE
Lose fat: subtract around 20% (or 500 calories)
Build muscle: add around 10 to 15%

Our TDEE calculator works this out from your age, sex, height, weight and activity level.

Step 2: Choose your macro split

A “split” is how you divide those calories between protein, carbs and fat. The most common ones:

Split	Protein	Carbs	Fat	Best for
Balanced	30%	40%	30%	Most people
High-protein	40%	40%	20%	Muscle, weight loss
Low-carb	40%	20%	40%	Carb-sensitive

Learn more about the popular high-protein option in our 40-40-20 diet guide.

Step 3: Convert to grams

This is the only maths, and it is simple. Each macro has a calorie value per gram:

Protein: 4 calories per gram
Carbs: 4 calories per gram
Fat: 9 calories per gram

To get grams: multiply your calories by each percentage, then divide by the calories per gram.

A worked example

Let’s say your target is 2,000 calories on a balanced (30/40/30) split:

Protein: 2,000 × 30% = 600 cal ÷ 4 = 150g
Carbs: 2,000 × 40% = 800 cal ÷ 4 = 200g
Fat: 2,000 × 30% = 600 cal ÷ 9 = 67g

That’s it. Three numbers to aim for each day.

Let the calculator do it

You do not have to do this by hand. Our macro calculator finds your calories, lets you pick a split, and shows your grams instantly. Then use our high-protein foods list and recipes to hit them.

The bottom line

Calculating macros is just three steps: calories, split, grams. Prioritise protein, get reasonably close rather than perfect, and adjust based on real-world results over a few weeks. The quickest way is to let our macro calculator handle the maths, then focus on the food.

This article is for general information and is not medical or nutritional advice. Speak to a qualified professional about your individual needs.

welanutria provides general information and estimates only, and is not medical or dietary advice. Speak with a qualified professional before making significant changes to your diet, exercise or health routine.

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