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Lean Body Mass Calculator

Lean mass from a body-fat percent you type, or Boer / James / Hume estimates from height, weight, and sex.

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Results

How to use Lean Body Mass Calculator

  1. Choose method first so the fields that apply to that job appear.
  2. Enter height (cm), feet, inches. Leave a field blank only when the page says the value is missing.
  3. Read the result rows under the form. Errors appear in the status line. Nothing is uploaded.
  4. Treat the figures as formula output, not a diagnosis, diet, pregnancy chart, or care plan.

Lean Body Mass Calculator

Percent method

ComputesLean mass from a body-fat percent you type, or Boer / James / Hume estimates from height, weight, and sex.
IncludesPercent method
IncludesBoer
IncludesJames
EnginenavyFat
UploadNone
AdviceInformational only

What Lean Body Mass Calculator is

From percent: lean = weight × (1 − bf/100). Boer, James, and Hume are published adult regressions; they can disagree with a tape or DEXA.

Informational only. Not a diagnosis, diet plan, pregnancy chart, or medical advice.

The formula runs in this tab. CZNull does not receive the numbers.

How this page computes

Navy tape percent is Navy body fat. Ideal-weight formulas are separate.

Entities and related jobs

Lean mass from a body-fat percent you type, or Boer / James / Hume estimates from height, weight, and sex. Named features: Percent method, Boer, James, Hume.

See also Navy Body Fat Calculator, BMI Calculator, Ideal Weight Calculator, BMR Calculator, TDEE Calculator.

Use cases

Splitting scale weight into lean and fat using a percent you already have, or a regression estimate. Not a clinical composition study.

Not medical advice

Invalid input appears in the status line. IEEE floating point applies unless a row says otherwise. CZNull does not receive the numbers.

Lean Body Mass Calculator questions

Does this page upload my numbers?
No. The formula runs in the page you opened. CZNull does not receive the values.
What does Lean Body Mass Calculator compute?
From percent: lean = weight × (1 − bf/100).
Why is this its own URL?
Search queries name this job. Nearby modes stay on their own pages so inputs do not mix. Related calculators are linked below Lean Body Mass Calculator.
80 kg at 20% fat?
Lean 64 kg, fat 16 kg.
Navy tape here?
No. Open Navy body fat first.
Is this medical advice?
No. It is arithmetic on the numbers you type. A clinician uses more than a single formula. See the disclaimer.