What is a Lean Body Calculator?

The Lean Body Calculator is a free, online tool useful for estimating your Lean Body Mass (LBM)—your weight minus fat. This includes your muscle, bones, organs, skin, and body water. Whereas BMI is a one-dimensional widget showing you only your weight-to-height ratio, the Lean Body Calculator will give you a much better sense of what’s going on in your body composition wise. If your fitness goals include the expansion of muscle mass, loss of fat, or a desire to maintain a well-balanced physique, understanding your lean body mass goes a long way.

It is incredibly simple to use! By simply providing your age, gender, height, weight, and (if available) body fat percentage, the Lean Body Calculator will return an accurate estimate of your lean body weight as a free tool! This is a massively useful tool for bodies such as athletes or bodybuilders, or anyone who has the goal of getting and being healthy, when coupled with a proper diet, training, and monitoring.

How Does the Lean Body Calculator Work?

The Lean Body Calculator has five stages to follow:

• Choose your gender (Male or Female).
• Complete your age, height, and weight.
• (Optional) If you want to be more accurate about your lean body weight, add your body fat percentage.
• Hit Calculate.

The Lean Body Calculator will then process your information and apply academic researcher equations (such as James, Boer, or Hume) to figure out your lean body mass or lean body weight.

Even if you don’t have the body fat percentage, the calculator will still provide a reasonable estimate with your average inputs. Outputs are as follows:

• Lean Body Mass (kg/lbs)
• Total Body Fat weight
• Percentage of Fat-Free Mass

This is just as effective for women as men, and effectively keeps track of progress through multiple stages of your training process.

Why Use This Lean Body Calculator?

• Beyond the Scale: Get a handle on true body composition, not weight.
• Follow Actual Progress: Measure muscle gain or fat loss along the way.
• Brighter Thinking: Customize nutrition and training for best results.
• Easy & Free: Extremely fast, internet, and no registration is required.

Disclaimer

This calculator is for general informational use only. Results are estimates and may vary. Always consult a certified health or fitness professional for personalized guidance.