Lean Body Mass Calculator > Formula and Chart

A Lean Body Mass (LBM) Calculator is a sophisticated tool designed to measure the total weight of your body excluding fat.

If a 30-year-old woman who weighs 140 pounds and has 25% body fat.

Her lean body mass calculator would show:

LBM = Total Weight - (Total Weight × Body Fat Percentage)
LBM = 140 - (140 × 0.25)
LBM = 140 - 35
LBM = 105 pounds

Lean Body Mass Calculator

Method	Gender	Weight (kg)	Height (cm)	Result (kg)
Boer	Male	75	180	61.3
James	Male	75	180	58.9
Body Fat %	Male	75	180	60.0
Boer	Female	60	165	45.2
James	Female	60	165	43.8
Body Fat %	Female	60	165	44.4
Boer	Male	85	175	68.6
James	Male	85	175	66.1
Body Fat %	Male	85	175	67.5
Boer	Female	70	170	52.1
James	Female	70	170	50.5
Body Fat %	Female	70	170	51.0
Boer	Male	90	185	73.4
James	Male	90	185	70.9
Body Fat %	Male	90	185	72.0
Boer	Female	65	160	48.0
James	Female	65	160	46.7
Body Fat %	Female	65	160	47.2
Boer	Male	95	190	77.2
James	Male	95	190	74.7
Body Fat %	Male	95	190	75.5
Boer	Female	55	155	39.8
James	Female	55	155	38.5
Body Fat %	Female	55	155	39.0

What is Lean Body Mass?

Lean Body Mass (LBM) represents the difference between total body weight and body fat weight.

Lean Body Mass represents the combined weight of your:

• Muscles
• Bones
• Organs
• Blood
• Skin
• Other bodily tissues (excluding fat)

Understanding your LBM is crucial for:

• Determining optimal protein intake
• Calculating basal metabolic rate
• Assessing medication dosages
• Tracking fitness progress effectively

Lean Body Mass Chart

Height (cm)	Male LBM Range (kg)	Female LBM Range (kg)
150-155	43-50	36-43
156-160	45-52	38-45
161-165	50-57	40-48
166-170	52-60	42-50
171-175	58-66	46-54
176-180	58-68	48-56
181-185	65-75	52-62
186-190	67-77	54-64
191-195	70-80	56-66
196-200	72-82	58-68
201-205	75-85	60-70
206+	78+	62+

Lean Body Mass Formula

The most widely used formula is the Boer Formula:

• For Males: LBM = 0.407 × Weight(kg) + 0.267 × Height(cm) – 19.2
• For Females: LBM = 0.252 × Weight(kg) + 0.473 × Height(cm) – 48.3

For a man weighing 80kg with a height of 175cm:

LBM = 0.407 × 80 + 0.267 × 175 - 19.2
LBM = 32.56 + 46.725 - 19.2
LBM = 60.085 kg

How to Calculate Lean Body Mass?

To calculate LBM accurately, follow these steps:

• Gather measurements: Body weight, Height,
• Choose calculation method: Body fat percentage method, Boer formula

For a 70kg person with 20% body fat:

LBM = 70 - (70 × 0.20)
LBM = 70 - 14
LBM = 56 kg

What is a Good Lean Body Mass for Height?

A healthy LBM varies significantly based on height, gender, and frame size. The optimal range typically falls within:

• Males: 75-85% of total body weight
• Females: 65-75% of total body weight

Example for a 175 cm tall male:

• Ideal weight range: 65-75 kg
• Target LBM: 49-64 kg

What is the LBW James Equation?

The James Equation is an alternative formula for calculating lean body weight:

• Males: LBW = 1.10 × Weight(kg) – 128 × (Weight²/(100 × Height(m))²)
• Females: LBW = 1.07 × Weight(kg) – 148 × (Weight²/(100 × Height(m))²)

For a 70kg, 1.75m tall male:

LBW = 1.10 × 70 - 128 × (70²/(100 × 1.75)²)
LBW = 77 - 128 × (4900/306.25)
LBW = 77 - 128 × 16
LBW = 57.12 kg

References

• American Council on Exercise (ACE) – Body Composition https://www.acefitness.org/resources/everyone/blog/body-composition/
• Journal of Sports Science & Medicine – Lean Body Mass Studies https://www.jssm.org

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