Macro Split Calculator
Set a daily calorie target and a macronutrient split, and this calculator converts the percentages into grams of protein, carbohydrate, and fat. It uses the standard energy values of 4 calories per gram of protein, 4 per gram of carbohydrate, and 9 per gram of fat, which is why the same calorie number produces very different gram totals across the three nutrients. Adjust the split to match a higher protein plan, a balanced plan, or a lower carb approach, and the grams update instantly. Everything is calculated locally in your browser, so your numbers stay private. This tool is for general information and planning only, not medical or nutritional advice, so treat the output as a starting point and confirm targets with a qualified professional if you have specific goals or conditions.
How to use Macro Split Calculator
- Enter your daily calorie target.
- Set the percentage for protein, carbs and fat.
- Read the resulting grams for each macronutrient.
Frequently asked questions
How are grams calculated from my calorie split?
It multiplies your calorie target by each chosen percentage, then divides by 4 for protein and carbs and by 9 for fat, since fat carries 9 calories per gram.
Do my chosen percentages have to add to 100?
Yes. The protein, carb and fat shares represent your whole calorie budget, so they should sum to 100 percent for the grams to add up.
Can I use any split I like?
Yes. You choose the percentages, so you can set a high protein, balanced or low carb split as you prefer.
What is Macro Split Calculator?
Set a daily calorie target and a macronutrient split, and this calculator converts the percentages into grams of protein, carbohydrate, and fat. It uses the standard energy values of 4 calories per gram of protein, 4 per gram of carbohydrate, and 9 per gram of fat, which is why the same calorie number produces very different gram totals across the three nutrients.
Is Macro Split Calculator free to use?
Yes. Macro Split Calculator is completely free, with no sign-up and no usage limits.
Does Macro Split Calculator work in a web browser?
Yes. Macro Split Calculator runs in any modern web browser. There is nothing to download or install.
Is my data private with Macro Split Calculator?
Yes. Macro Split Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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