Macro Split Calculator
Turn your daily calorie target into protein, carb, and fat grams.
Use your TDEE calculator result, or a target calorie goal for cutting/bulking.
Macro Split
Protein (30%)
150g
Carbs (40%)
200g
Fat (30%)
67g
What is it?
This calculator converts a daily calorie target into grams of protein, carbohydrates, and fat, based on a percentage split you choose — either a common preset or a fully custom ratio.
Formula
Protein/Carb grams = (Calories × %) ÷ 4
Fat grams = (Calories × %) ÷ 9
Formula Explanation
Protein and carbohydrates both provide about 4 calories per gram, while fat provides about 9 calories per gram — roughly double. This is why fat grams are much lower than protein or carb grams even at the same percentage of total calories, and why macro percentages don't translate to equal gram amounts.
Example Calculation
On a 2,000 calorie diet with a Balanced 30/40/30 split: protein is (2000×0.30)÷4 = 150g, carbs are (2000×0.40)÷4 = 200g, and fat is (2000×0.30)÷9 ≈ 67g.
How to Use
- Enter your daily calorie target (from a TDEE calculator or your own goal).
- Choose a macro split preset, or select Custom to set your own percentages.
- If using custom percentages, make sure they add up to 100%.
- Read off your daily protein, carb, and fat targets in grams.
Benefits
- Converts abstract percentage splits into concrete, trackable gram targets.
- Includes common preset splits for balanced, high-protein, low-carb, and keto approaches.
- Fully customizable for any specific macro ratio you're following.
Use Cases
- Setting daily macro targets for a specific diet approach (balanced, low-carb, keto, etc.).
- Planning meals around protein, carb, and fat targets rather than calories alone.
- Adjusting macro splits when changing between cutting, maintenance, or bulking phases.
What Your Result Means
These gram targets are what to aim for across your full day of eating to hit both your calorie and macro split goals. Many food tracking apps let you log against these targets directly, making it easier to hit a specific dietary approach consistently.
Tips
- Combine this with a TDEE calculator to first find your daily calorie target, then split it into macros here.
- Protein needs are often set relative to body weight (e.g. 1.6-2.2g per kg) for muscle-building goals — check that your percentage-based target lines up reasonably with that.
- Very low-carb or keto splits require careful planning to hit fiber and micronutrient needs — consider consulting a dietitian for extended use.
Common Mistakes
- Setting a calorie target without first considering activity level and goals — get your calorie number right before worrying about the macro split.
- Using custom percentages that don't add up to 100%, which produces an inconsistent or invalid split.
- Switching macro splits too frequently, which makes it hard to judge whether an approach is actually working.
FAQs
Which macro split is best?
There's no universally 'best' split — it depends on your goals, preferences, and how your body responds; a moderate balanced or high-protein split works well for most general fitness goals.
Why does fat have fewer grams than protein at the same percentage?
Because fat has about 9 calories per gram compared to 4 for protein and carbs, so the same percentage of total calories translates to roughly half as many grams for fat.
How do I find my daily calorie target first?
Use a TDEE (Total Daily Energy Expenditure) calculator to estimate your maintenance calories, then adjust up or down from there depending on whether your goal is gaining, maintaining, or losing weight.
This tool provides general macro targets for informational purposes — consult a registered dietitian for personalized nutrition guidance, especially for restrictive diets.
Last updated: July 26, 2026