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Lean Body Mass Calculator – Estimates the weight of everything in the body ...

The Lean Body Mass Calculator estimates the weight of everything in the body except fat. This Lean Body Mass Calculator uses an established clinical or fitness formula to give you a personalised estimate in seconds. Results are for educational reference — for specific health decisions, discuss with your doctor.

The formula behind this calculator: Subtracts estimated fat mass from total body weight, or uses formulas like Boer based on height and weight. As a practical example: A 180lb person at 20% body fat has a lean body mass of about 144 lbs. All results are calculated instantly in your browser — no data is stored or transmitted.

Lean Body Mass Calculator FAQ

What does the Lean Body Mass Calculator calculate?

Estimates the weight of everything in the body except fat.

Should I use metric or imperial units?

Either — the calculator accepts both. Metric values (kg, cm) tend to have simpler conversion paths in the underlying formulas.

Is this a substitute for medical advice?

No. These calculators provide general estimates for educational purposes only. Always consult a doctor or qualified health professional for medical decisions.

Is this calculator free?

Yes — all CalcHive calculators are free with no sign-up, no account, and no usage limits.