This section explains the rule behind the result in plain language.
CalcBeacon tool
Lean Body Mass Calculator
Estimate lean body mass from weight, height, and sex using the Boer formula.
Enter your numbers
Formula: Boer equation for lean body mass
Result
Health result panel
Main result
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Lean body mass—
Estimated fat mass—
How to read the Lean Body Mass Calculator result
Lean body mass estimates how much of body weight is not fat mass, including muscle, bone, organs and water.
Specific formula
- Boer male: LBM = 0.407 × weight kg + 0.267 × height cm − 19.2
- Boer female: LBM = 0.252 × weight kg + 0.473 × height cm − 48.3
Example interpretation
Example: a 78 kg, 178 cm male gives about 60.1 kg estimated lean body mass using the Boer equation.
Common mistakes
- Assuming lean body mass means only muscle mass.
- Comparing results from different equations as if they were identical.
- Ignoring hydration and body composition changes over time.
Use the result as an estimate for context, not a direct scan result.
Quick answer
Lean Body Mass Calculator: Lean Body Mass Calculator helps turn health and body metrics inputs into a clear result you can compare, explain, and use for a practical decision.
Use this example as a quick check on how the inputs affect the answer.
Checking this point helps prevent a misleading result.
How to interpret the result
Read the result together with the units, assumptions and any limits shown on the page. Small input changes can meaningfully change the answer.
Methodology
This page uses the values you enter, applies the arithmetic for lean body mass calculator, and displays the result immediately in the result panel. The page keeps the answer, formula, example and explanation together so the calculation is easier to verify and easier for search systems to understand.
Reviewed by CalcBeacon Editorial TeamUpdated May 2026Category: Health CalculatorsTransparent formula and example
How this calculator works
Estimate lean body mass from weight, height, and sex using the Boer formula.
Method
Use the inputs to calculate the result instantly based on the values entered.
Example
Enter values that match your real scenario in each field, then compare the output and adjust the inputs to test a second scenario.
Frequently asked questions
What does the lean body mass calculator show?
It shows the budget result from the income, spending and savings values entered on this page.
Is this lean body mass calculator free to use?
Yes. CalcBeacon tools are designed for quick free use in the browser.
How to use the lean body mass calculator
Estimate lean body mass from weight, height, and sex using the Boer formula. Use this page for a quick estimate, compare a few scenarios, and adjust the inputs until the result matches what you need to decide.
This tool also sits inside the CalcBeacon health cluster. That makes it easier to find from category pages, related tools, and supporting guides when you want to compare options.
When it is usefulUse this tool when you want a quick estimate, want to compare options, or want a clearer answer before moving on.
Common mistakesCheck that your numbers use the same units, avoid leaving key fields blank, and test a second scenario so you can see how sensitive the final result is.
Next useful stepAfter using this page, compare the result with a related calculator or open the guide to check the number in context.
Related tools
Use these related tools to compare nearby calculations and move to the next step faster.