Nutrition & Body Composition
Protein Intake Calculator
Calculate daily protein grams from body weight and an editable g/kg or g/lb factor. Compare age-specific general references and sports nutrition ranges.
Your estimate
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assumptions
An educational estimate, not a measurement or medical advice.
Behind the numbers
How this calculator works
Protein grams per day = body weight × chosen factor, using kg with g/kg/day or lb with g/lb/day. Converted factors are rounded to one decimal; references explain their applicable population.
A worked example
At 70 kg and a chosen factor of 1.2 g/kg, the result is 84 g/day.