Muscle Mass Calculator

The Muscle Mass Calculator estimates the amount of muscle in the lead's body based on key measurements such as weight, height, and body composition. It helps them understand their muscle development and track progress over time.

The following details would be entered by the calculator user to calculate their muscle mass: 

• Biological gender
  
• Height 
• Weight range
• Waist measurement
• Neck measurement
• Hip measurement (for women only)

The details they input will then be used to calculate their muscle mass using the following formulas: 

Body fat (BF):

For men: 

Body Fat Percentage=86.010×log10(Waist−Neck)−70.041×log10(Height)+36.76

For women:

Body Fat Percentage=163.205×log10(Waist+Hips−Neck)−97.684×log10(Height)−78.387

Lean Body Mass (LBM): 

LBM (lbs) = Weight × (1 - Body Fat % / 100)

Skeletal Muscle Mass (SMM):

SMM (lbs) = Lean body mass × 0.53 (applicable to average healthy adults)

Skeletal Muscle Mass % of body weight

SMM% = (WeightSMM)×100

Score calculation

Calculation results are interpreted as follows: 

Default email responses

Each muscle mass percentage range has a default email response that is sent to the lead once they submit the form. The default messages can be customized to better match your messaging. Customization can be done when you create your muscle mass calculator.

Low skeletal muscle mass

Default email copy: 

Your muscle mass is low relative to your total body weight. This may indicate underdevelopment or loss of muscle tissue, which can affect your strength, mobility, and physical performance. Improving muscle mass in this range will help you enhance overall function and support better physical health in the long term.

Below adequate skeletal muscle mass

Default email copy: 

Your muscle mass is not at an optimal level for supporting your physical strength and endurance. While you have some muscle mass, it falls short of what's needed for efficient movement and strength. Building muscle in this range can help you improve overall physical capacity and health.

Adequate skeletal muscle mass

Default email copy: 

Your muscle mass is sufficient for everyday activities and basic physical function. While you're in a good place, reaching the optimal range would further enhance your strength, endurance, and overall physical fitness. Increasing muscle mass here can help boost your performance and health.

Optimal skeletal muscle mass

Default email copy: 

Your muscle mass is well-developed relative to your body weight, contributing to excellent strength, endurance, and functional fitness. This level supports overall health, helps maintain a healthy metabolism, and sets a strong foundation for long-term physical well-being.

Above optimal skeletal muscle mass

Default email copy: 

Your muscle mass is highly developed, offering superior strength and endurance relative to your body size. This level of muscle mass is typically seen in individuals with high physical training. It provides significant health benefits, boosts metabolism, and contributes to an elevated level of physical performance and well-being.

To edit the copies of each email response, please see our help article on creating a calculator and editing the email templates.