What is lean body mass?

Lean body mass (LBM) is the total weight of your body minus your body fat. It includes muscle, bone, organs, skin, and water. Tracking LBM is more useful than total weight when assessing changes in body composition.

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 is published in Clinical Pharmacology & Therapeutics 36:5 (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. No data is sent to our servers.

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)

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.

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 lean body mass?: Lean body mass (LBM) is the total weight of your body minus your body fat. It includes muscle, bone, organs, skin, and water. Tracking LBM is more useful than total weight when assessing changes in body composition.
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 is published in Clinical Pharmacology & Therapeutics 36:5 (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. No data is sent to our servers.

Lean body mass calculator for men

How it works

Processing runs in your browser

Related operations

Frequently asked questions

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