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Both calculators run independently β€” change the inputs on either side to compare results.

Muscle Building

Muscle Protein Synthesis Window Calculator

Calculate how many grams of protein you should consume per meal to maximally stimulate muscle protein synthesis, given your body weight, daily protein target, meal frequency, and workout timing. Use it when designing a meal plan for muscle growth.

Fill in the required fields to see your result.
Muscle Building

Muscle Gain Prediction Calculator

Estimates how many pounds of lean muscle you can realistically gain per month based on your training history, body weight, genetics, training intensity, and nutrition. Use it to set evidence-based expectations before starting a new program.

Fill in the required fields to see your result.

Key differences

Muscle Protein Synthesis Window CalculatorMuscle Gain Prediction Calculator
CategoryMuscle BuildingMuscle Building
Inputs required45
ResultOptimal Protein per Meal (grams)Monthly Muscle Gain Potential (lbs)
What it doesCalculate how many grams of protein you should consume per meal to maximally stimulate muscle protein synthesis, given your body weight, daily protein target, meal frequency, and workout timing. Use it when designing a meal plan for muscle growth.Estimates how many pounds of lean muscle you can realistically gain per month based on your training history, body weight, genetics, training intensity, and nutrition. Use it to set evidence-based expectations before starting a new program.