How to use the daily protein calculator
Estimate daily protein needs. Enter weight, goal in the fields above; the protein needed, energy from protein are computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- w — Weight (kg)
- g — Goal (g/kg)
Worked example
With weight = 70 kg, goal = Active, the calculator gives protein needed ≈ 84 g/day; energy from protein ≈ 336 kcal/day.
Frequently asked questions
What is the formula for the daily protein calculation?
Protein needed (g/day) = w × g. Energy from protein (kcal/day) = [Protein needed] × 4. Here w is weight (kg), g is goal (g/kg).
What inputs do I need for the daily protein calculator?
You need weight in kg, goal in g/kg. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.