Health
Body Fat Calculator
Use this body fat calculator to estimate body fat percentage from body measurements. It is designed for educational reference and trend thinking, not for clinical diagnosis.
Estimated body fat
15.5%
Reference category: Fitness range.
How this calculator works
This calculator uses a simplified circumference-based method that relies on height plus neck, waist, and sometimes hip measurements. It is commonly used for rough body-composition estimates when more advanced testing is not available.
That makes it more composition-focused than the BMI calculator, even though it is still an estimate rather than a clinical measurement.
What the result means
The result shows an estimated body fat percentage and a broad reference category. That category is only meant to help you read the estimate more easily. It is not a diagnosis and should not be used as a standalone health judgment.
For broader context, pair it with BMI vs. body fat percentage and the health hub.
Important limitations
Home body-fat estimates can vary depending on measurement technique, body shape, and the method used. Circumference formulas are useful for rough context but should not be treated as exact.
This tool does not diagnose health conditions or provide medical advice. If body-composition interpretation is tied to a medical or treatment concern, consult a qualified healthcare professional.
When to use this calculator
Use this calculator when you want a rough body-composition-style estimate, especially if BMI alone feels too broad for the question you are asking.
It works well next to the BMI calculator, the healthy weight guide, and the health hub.
Related tools
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BMI Calculator
Estimate body mass index using either imperial or metric measurements.
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BMR Calculator
Estimate basal metabolic rate using a common BMR formula and simple body measurements.
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Calorie Calculator
Estimate maintenance calories and simple gain-or-loss targets using age, sex, height, weight, and activity assumptions.
FAQs
Is body fat percentage more exact than BMI?
Not automatically. It can provide different context, but simplified body-fat methods are still estimates.
Do I need hip measurements?
Hip measurements are commonly used for women in circumference-based methods, while the simplified male method usually relies on neck and waist measurements.
Can tape-measure errors affect the result?
Yes. Small measurement differences can change the estimate, so consistency matters.
Should I treat the category as a diagnosis?
No. It is a broad reference label, not a clinical diagnosis.
Is this medical advice?
No. It is an educational estimate only.