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.
Common searches this calculator answers include “how much protein per day”, “grams per kg”, “muscle building protein”, “calculate daily protein”, “find protein needed”.
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 daily protein calculator used for?
Estimate daily protein needs. It helps with questions such as “how much protein per day”, “grams per kg”, “muscle building protein”.
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 the daily protein 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 daily protein 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.