This Lean Body Mass Calculator allows you to estimate your lean body mass (LBM) based on your gender, body weight and height. The calculator employs four powerful algorithms – the Boer, the James, the Hume, and the Peters equations – to calculate your LBM.

This tool is exceptionally easy to use. Simply follow the five basic steps below:

- 1. Select your measurement system (imperial or metric)
- 2. Select your gender (female or male)
- 3. Input details of your weight and height
- 4. Choose which equation you would like to use to calculate your LBM, and
- 5. Hit "Calculate" to compute your LBM.

## Reference

Lean Body Mass (LBM) equals a person's total body weight minus their total fat mass, so the main equation is as follows:

**LBM = BW - BF**

Where, LBM is the lean body mass, BW is the body weight,
BF is the body fat.

## Formulas

The equations to compute your LBM are listed below:

### The Boer equation

**Women:** 0.252 × weight[kg] + 0.473 × height[cm] - 48.3

**Men:** 0.407 × weight[kg] + 0.267 × height[cm] - 19.2

### The James equation

**Women:** 1.07 × weight[kg] - 148 × ( weight[kg] / height[cm] )^{
2}

**Men:** 1.1 × weight[kg] - 128 × ( weight[kg] / height[cm] )^{
2}

### The Hume equation

**Women:** 0.29569 × weight[kg] + 0.41813 × height[cm] -
43.2933

**Men:** 0.32810 × weight[kg] + 0.33929 × height[cm] - 29.5336

### The Peters equation

This equation is used to estimate LBM of children (up to 13 to 14 years old).

0.0817 × ( (weight[kg])^{
0.6469} × (height[cm])^{ 0.7236} )

You may also be interested in our Ideal Body Weight Calculator

**Estimated Lean Body Mass (LBM):**

**Estimated Body Fat Mass (BFM):**

This Lean Body Mass Calculator allows you to estimate your lean body mass (LBM) based on your gender, body weight and height. The calculator employs four powerful algorithms – the Boer, the James, the Hume, and the Peters equations – to calculate your LBM.

This tool is exceptionally easy to use. Simply follow the five basic steps below:

- 1. Select your measurement system (imperial or metric)
- 2. Select your gender (female or male)
- 3. Input details of your weight and height
- 4. Choose which equation you would like to use to calculate your LBM, and
- 5. Hit "Calculate" to compute your LBM.

## Reference

Lean Body Mass (LBM) equals a person's total body weight minus their total fat mass, so the main equation is as follows:

**LBM = BW - BF**

Where, LBM is the lean body mass, BW is the body weight,
BF is the body fat.

## Formulas

The equations to compute your LBM are listed below:

### The Boer equation

**Women:** 0.252 × weight[kg] + 0.473 × height[cm] - 48.3

**Men:** 0.407 × weight[kg] + 0.267 × height[cm] - 19.2

### The James equation

**Women:** 1.07 × weight[kg] - 148 × ( weight[kg] / height[cm] )^{
2}

**Men:** 1.1 × weight[kg] - 128 × ( weight[kg] / height[cm] )^{
2}

### The Hume equation

**Women:** 0.29569 × weight[kg] + 0.41813 × height[cm] -
43.2933

**Men:** 0.32810 × weight[kg] + 0.33929 × height[cm] - 29.5336

### The Peters equation

This equation is used to estimate LBM of children (up to 13 to 14 years old).

0.0817 × ( (weight[kg])^{
0.6469} × (height[cm])^{ 0.7236} )

You may also be interested in our Ideal Body Weight Calculator