Keto Macro Calculator

Build a ketogenic macro split from a calorie target, a carb limit and a protein percentage.

Usage Tip

Set protein adequate, carbs low, and let fat fill the remaining calories.

Daily Fat
— g fat
Fat fills the remaining calories
THE MATH
fat calories = total − (carbs × 4) − (protein %)
Carbs and protein provide 4 kcal/g; fat provides 9 kcal/g.
Standard keto keeps carbs very low (often under 25–50 g) with fat as the main fuel.
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.