What this calculator does
Daily protein intake works out protein target range based on body weight and activity level. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaProtein (g/day) = weight(kg) × factor, factor from 0.8 g/kg (RDA) up to 2.0 g/kg (strength training)
The inputs explained
| Field | What to enter |
|---|---|
| Body weight (kg) | A number, measured in kg. Starts at 75. |
| Activity level | Choose from Sedentary: RDA minimum, Light activity, Regular exercise, Strength training / athlete. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with body weight
Every other input is held at the calculator’s starting values while body weight varies. Select any row to load that scenario into the calculator.
How the answer changes with body weight