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Protein Calculator
Estimate grams of protein per day from body weight and a grams-per-kilogram factor you choose. Split the result across meals or compare it with an intake you enter.
How do I calculate a daily protein amount from body weight?
Convert body weight to kilograms, then multiply it by the grams-per-kilogram factor you choose. Divide that daily estimate by the number of meals for an even arithmetic split.
Frequently asked questions
How do I calculate a daily protein amount from body weight?
Convert body weight to kilograms, then multiply it by the grams-per-kilogram factor you choose. Divide that daily estimate by the number of meals for an even arithmetic split.
Is my weight uploaded or saved?
No. The calculation runs in this browser. Your weight and intake are not uploaded or saved by this tool.
What does 0.8 grams per kilogram mean?
It means multiplying body weight in kilograms by 0.8 to get grams per day. The National Academies lists 0.8 g/kg/day as the Recommended Dietary Allowance for adults; it is a general reference, not an individualized target.
Does this calculator tell me how much protein I personally need?
No. It performs arithmetic with the factor you enter. Age, health, pregnancy, activity, and other circumstances can affect needs, so ask a qualified clinician or dietitian for personal guidance.
Is the amount per meal a recommended serving?
No. It simply divides the selected daily estimate evenly by your meal count. Real meals do not have to contain equal amounts.