Macro Split Calculator
Split a daily calorie target into protein, carb and fat grams using a preset diet style or your own custom percentages.
Frequently asked questions
Is this tool free?
Yes. Calchemy tools are free to use in your browser.
Is my data uploaded?
No. The tools are designed to run locally in your browser unless clearly stated otherwise.
How are grams calculated from percentages?
Protein and carbs are counted at 4 calories per gram, and fat at 9 calories per gram. Each macro's percentage of your daily calories is divided by its calories-per-gram to get the gram target.
What do the diet style presets assume?
Balanced is roughly 30/40/30 (protein/carb/fat), high-protein is 40/30/30, low-carb is 35/20/45, and keto is 25/5/70. You can also enter fully custom percentages.
This is not medical advice.
This calculator provides an estimate for general interest and is not a substitute for professional medical or nutritional advice.