Protein Calculator Protein Calculator The Protein Calculator determines daily protein needs based on individual factors, aiding in meal planning for fitness, muscle gain, or weight loss. Protein Calculator Weight (kg): Activity Level: Sedentary (little or no exercise) Lightly Active (light exercise/sports 1-3 days/week) Moderately Active (moderate exercise/sports 3-5 days/week) Very Active (hard exercise/sports 6-7 days/week) Extra Active (very hard exercise & physical job or 2x training) Share the tool