Lean Body Mass Calculator (lbm Calculator)
Calculate your lean body weight and body fat percentage using your height and weight
| Boer Formula | Lean Body Mass (kg) | Lean Body Mass (%) | Body Fat (%) |
|---|---|---|---|
| Male | 61.51 kg | 76.9 % | 23.1 % |
| Female | 57.16 kg | 71.4 % | 28.6 % |
| James Formula | Lean Body Mass (kg) | Lean Body Mass (%) | Body Fat (%) |
|---|---|---|---|
| Male | 62.81 kg | 78.5 % | 21.5 % |
| Female | 56.48 kg | 70.6 % | 29.4 % |
| Hume Formula | Lean Body Mass (kg) | Lean Body Mass (%) | Body Fat (%) |
|---|---|---|---|
| Male | 57.9 kg | 72.4 % | 27.6 % |
| Female | 55.77 kg | 69.7 % | 30.3 % |
| Peters Formula | Lean Body Mass (kg) | Lean Body Mass (%) | Body Fat (%) |
|---|---|---|---|
| Child | 59.68 kg | 74.6 % | 25.4 % |
Lean body weight formula
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For Male,
LBM (kg) = 0.407 * weight [kg] + 0.267 * height [cm] - 19.2
For Female,
LBM (kg) = 0.252 * weight [kg] + 0.473 * height [cm] - 48.3
For Male,
LBM (kg) = 1.1 * weight [kg] - 128 (weight [kg] / height [cm])^2
For Female,
LBM (kg) = 1.07 * weight [kg] - 148 (weight [kg] / height [cm])^2
For Male,
LBM (kg) = 0.32810 * weight [kg] + 0.33929 * height [cm] - 29.5336
For Female,
LBM (kg) = 0.29569 * weight [kg] + 0.41813 * height [cm] - 43.2933
LBM (kg) = 3.8*[0.0215 *((weight [kg])^0.6469))*((height [cm])^0.7236)]
LBM (%) = (Lean body mass (in kg) / Weight in kg) * 100
Lean Fat (%) = 100 - lean body mass (lbm) in %
Know More about Lean body Mass
Lean body mass is the weight of the human body excluding the fat mass.
Lean body mass measures weight of organs , muscles, bones, Tissues and body fluids.
As compared to Lean body Mass, Lean muscle mass is just the weight of muscles and does not include weight of organs, bones, tissues and body fluids. .
What is Body Fat?
This is the exact fat percentage in the body which is not lean body mass.
This is calculated as total weight - (weight of muscles, bones, fluids except fat).
The normal body fat percentage is between 10% to 30%.
Athletes and Fitness level Persons will have body fat percentage of 10% to 15%
Body Fat % Normal Range Table
| Body Fat Level Description | Body Fat % for Men | Body Fat % for Women |
|---|---|---|
| Very low level of fat | 2 | 8-10 |
| Essential fat | 2 - 5 | 10 - 13 |
| Athletic Level of Fat | 6 - 13 | 14 - 20 |
| Fitness Level of Fat | 14 - 17 | 21 - 24 |
| Average / Normal Level of Fat | 18 - 25 | 25 - 31 |
| Obesity / High Fat Level | > 25 | > 32 |
Frequently Asked Questions on LBM
Lean body mass is the weight of the human body excluding the fat mass.
Lean body mass measures weight of organs , muscles, bones, Tissues and body fluids.
This is the exact fat percentage in the body which is not lean body mass.
This is calculated as total weight - (weight of muscles, bones, fluids except fat).
BMI gives a measure of body fat using height and weight and does not distinguish between muscle mass and fat mass.
So a high value of BMI may be misleading in persons who have high muscle mass.
Lean body mass measures the mass / weight excluding body fat which is more accurate.
75 % - 85 %
70 % - 75 %
The range of lean body mass considered to be healthy is around 75% - 90%.
The range of body fat considered to be healthy is around 10% - 25%
LBM For Adults has 3 different formulae as given by Boer, James and Hume and known by their names.
There is a separate formula to calculate LBM for children and this is Peters Formula.
As per Boer's Formula,
For Male,
LBM (kg) = 0.407 * weight [kg] + 0.267 * height [cm] - 19.2 .
For Female,
LBM (kg) = 0.252 * weight [kg] + 0.473 * height [cm] - 48.3
It should be high and in the range of 80% - 90% for men and 70% - 85% for women
More muscles means higher burn rate of calories and better metabolism.
Also it indicates reasonable bone density.
Higher fat content in the body leading to obesity and related issues.
Lower bone density could also lead to potential issues.
