Macro Split Calculator
Convert a calorie target and macro percentages into grams.
Convert a macro ratio into daily grams
Nutrition plans often talk in percentages, but food labels and trackers need grams. This macro split calculator turns a daily calorie target into protein, carbohydrate, and fat grams using the standard calorie densities: protein and carbs at 4 calories per gram, fat at 9 calories per gram.
For example, 2,400 calories at 30 percent protein, 40 percent carbs, and 30 percent fat becomes 180 grams of protein, 240 grams of carbs, and 80 grams of fat. Seeing grams makes the target easier to compare with meals.
Check the split before trusting the output
The most common mistake is entering percentages that do not add to 100. This calculator reports the percentage total and still shows the math, so you can spot a 90 percent or 110 percent split immediately. It is a conversion helper, not a nutrition prescription, and all inputs remain in your browser.
Frequently Asked Questions
How are macro grams calculated?
Protein and carbohydrates use 4 calories per gram, while fat uses 9 calories per gram. The tool applies those conversions to each calorie share.
Do the percentages need to equal 100?
Yes. The calculator shows the total percentage so you can fix a split that is under or over 100 percent.
Can I use this for any diet style?
Yes, if the diet can be described as calorie percentages. The tool does not judge whether a split is appropriate for your goals.
Are my calories or macros uploaded?
No. All conversions happen locally on the page.
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