Lean Body Mass (LBM) is the weight of everything in your body except fat. This includes your muscles, bones, organs, water, and connective tissues. It represents the metabolically active tissue in your body.
除脂肪体重計算機
Use our free 除脂肪体重計算機 to get an instant, science-backed result in under 30 seconds. All calculations run entirely in your browser — no data leaves your device, no account required.
What Is 除脂肪体重計算機?
How to Calculate — The Boer Formula & US Navy Method Formula
We calculate LBM using the widely validated Boer formula and the James formula, which use height, weight, and gender correlations to estimate non-fat mass.
- Enter your gender, height, and current weight accurately.
- Review your lean mass estimation.
- Compare it over time to ensure you are retaining muscle during weight loss.
What Does Your Result Mean?
Frequently Asked Questions
Why is tracking lean mass important?
When you lose weight, you want to lose fat, not muscle. Tracking LBM helps ensure your diet and exercise program is preserving your muscle tissue.
Can lean mass increase?
Yes, through resistance training (weightlifting) and adequate protein intake, you can increase your lean mass by building muscle.
Is lean mass the same as muscle mass?
No. Skeletal muscle is just one component of lean mass. Lean mass also includes bones, water, and organs.
How accurate are these formulas?
They provide a good estimate for the general population. However, athletes or those with very low/high body fat may need a DEXA scan for absolute accuracy.
Next Steps
Now that you have your 除脂肪体重計算機 result, use these tools to build a complete picture of your health metrics.
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Evidence-informed calculator · Updated August 2026
This calculator uses the stated published equation (Boer Formula & US Navy Method) and is for educational use. A calculator result is an estimate, not medical advice or an individual clinical assessment.
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