What is a typical lean body mass for a man?

For a man 180 cm tall weighing 85 kg, the Boer formula gives about 63.5 kg of lean mass and 21.5 kg of fat mass, an implied body fat of 25.3%. Lean mass covers muscle, bone, organs, skin, and water. Results are estimates for informational purposes only.

Which formula does this calculator use?

This calculator uses the Boer (1984) formula: LBM (men) = 0.407 × weight (kg) + 0.267 × height (cm) − 19.2. It was published by P. Boer in the American Journal of Physiology, volume 247 (1984).

What is a healthy body fat percentage for men?

For men, essential fat is roughly 2–5%, athletic range is 6–13%, fitness range is 14–17%, and the average range is 18–24%. Above 25% is generally considered high.

Is my data sent to a server?

All calculations run locally in your browser using JavaScript. Our servers are not involved at any point.

Lean body mass calculator for men

Estimate your lean body mass (LBM) using the Boer (1984) formula for men. Enter your weight and height to see your LBM in kg and lbs, your fat mass, and your implied body fat percentage. All calculations run locally in your browser.

Sex

Units

Weight (kg)

Height (cm)

Results are for informational purposes and do not constitute medical advice.

How it works

The Boer (1984) formula estimates lean body mass from weight and height. For men: LBM = 0.407 × weight (kg) + 0.267 × height (cm) − 19.2. For women: LBM = 0.252 × weight (kg) + 0.473 × height (cm) − 48.3. Imperial inputs are converted to metric before calculation. Fat mass is calculated as total weight minus LBM, and body fat percentage as fat mass divided by total weight multiplied by 100. All arithmetic runs in JavaScript in your browser.

Processing runs in your browser

All calculations happen locally in your browser tab. Our servers are not involved at any point.

Technical specification

The Boer formula was published by P. Boer in the American Journal of Physiology, volume 247 (1984), as a way to estimate lean body mass from weight and height. It uses separate equations for men and women. Because the only inputs are weight, height, and sex, the estimate cannot separate muscle from fat at a given weight.

Men: 0.407 × kg + 0.267 × cm − 19.2
Women: 0.252 × kg + 0.473 × cm − 48.3
Inputs: Weight up to 650 kg, height 50–272 cm
Browser API: Pure JavaScript arithmetic. No library

Related operations

For measuring body fat directly with circumference inputs, try the body fat calculator. To check a general weight category, use the BMI calculator. For a reference weight range tied to height, see the ideal weight calculator.

Frequently asked questions

What is a typical lean body mass for a man?: For a man 180 cm tall weighing 85 kg, the Boer formula gives about 63.5 kg of lean mass and 21.5 kg of fat mass, an implied body fat of 25.3%. Lean mass covers muscle, bone, organs, skin, and water. Results are estimates for informational purposes only.
Which formula does this calculator use?: This calculator uses the Boer (1984) formula: LBM (men) = 0.407 × weight (kg) + 0.267 × height (cm) − 19.2. It was published by P. Boer in the American Journal of Physiology, volume 247 (1984).
What is a healthy body fat percentage for men?: For men, essential fat is roughly 2–5%, athletic range is 6–13%, fitness range is 14–17%, and the average range is 18–24%. Above 25% is generally considered high.
Is my data sent to a server?: All calculations run locally in your browser using JavaScript. Our servers are not involved at any point.

Last reviewed September 30, 2026

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