Lean Body Mass Calculator

Calculate Your Lean Body Mass

Lean Body Mass is the measurement of all the parts of your body that aren’t fat. This includes just about anything from bones, muscles, and organs to water and hormones.

Therefore, it takes into account all aspects of your body to give an overall picture of what you look like beyond simply what you weigh on a scale.

Our calculator can help you to inform exercise and diet tailored specifically for your needs,

Most of the time, people don’t say what percentage of their total body mass is lean, but it’s usually between 60% to 90%.

Instead, the body fat percentage is calculated, which is the opposite and is usually between 10 to 40%.

Lean Body Mass

How to Use Our Lean Body Mass Calculator?

Calculating lean body mass (LBM) is a great way to track not only your body weight, but also your physical health.

For this lean body mass calculator, we’ll be using the Boer formula which is said to be the most accurate.

Depending on your gender, you’ll use a different equation—for men it’s 0.407 × weight [kg] + 0.267 × height [cm] – 19.2, and for women it’s 0.252 × weight [kg] + 0.473 × height [cm] – 48.3.

Even better yet, if you know your fat concentration then you can determine an exact

LBM according to another simple formula: Lean Body Mass = Body Weight – (Body Weight × Body Fat %).

All you have to do is measure your body weight, multiply it by the fat percentage, and subtract that result from your body weight — easy-peasy! Right?

Example: Suppose, a 50-year-old man height 170 cm and weight 70 kg. Then the person’s lean body mass is 54.68 kg.

Lean Body Mass Calculator

LBM Calculator Formula

There are two formulas you consider, according to Wikipedia.

The Boer formula is:

For women: LBM = (0.252 × W) + (0.473 × H) − 48.3

For men: LBM = (0.407 × W) + (0.267 × H) − 19.2

W = body weight in kilograms

H = body height in centimeters.

Hume Formula :

For men: LBM = (0.32810 × W) + (0.33929 × H) − 29.5336

For women: LBM = (0.29569 × W) + (0.41813 × H) − 43.2933

John Harvey
John Harvey

John Harvey M.D., M.P.H. is the Director of VA Greater Los Angeles Healthcare System and a Professor at T.H Chan School of Public Health . As an Internal Medicine physician at Boston Healthcare System, I aim to improve healthcare quality and costs through policy-focused research. I earned my M.D. and M.P.H. from Harvard, and completed fellowships at University of California, San Francisco.