Protein Calculator
Please enter a valid weight.
What Is a Protein Calculator?
A protein calculator estimates your daily protein needs in grams, based on your body weight and activity level or fitness goal. Protein supports muscle repair, growth, and satiety, and needs vary significantly depending on how active you are.
Formula Used
Daily Protein (g) = Weight (kg) × Protein Factor
The protein factor ranges from about 0.8 g/kg for sedentary individuals up to 2.0+ g/kg for those focused on aggressive muscle building, based on general sports nutrition guidelines.
How to Use This Calculator
Enter your weight and select the option that best matches your activity level or goal. Click "Calculate Protein Needs" to see your recommended daily protein target in grams.
Why Protein Needs Vary So Much
Sedentary individuals need protein mainly for basic tissue maintenance, while those doing regular strength training or trying to build muscle need more to support muscle protein synthesis and recovery from training stress.
Frequently Asked Questions
Is more protein always better?
Not necessarily — beyond a certain point (generally around 2.2 g/kg for most people), additional protein intake shows diminishing returns for muscle building.
Should I spread protein evenly throughout the day?
Many nutrition experts suggest spreading protein across 3-4 meals to optimize muscle protein synthesis, rather than consuming it all in one sitting.
Do I need more protein when losing weight?
Yes, higher protein intake during a calorie deficit helps preserve muscle mass while losing fat, which is why the weight loss option uses a higher factor than sedentary.
How does this relate to the Macro Calculator?
This calculator focuses specifically on protein using body-weight-based targets. Our Macro Calculator calculates protein as part of a full calorie and macronutrient breakdown.