Body Fat Calculator
Use a browser-based body fat calculator to estimate body fat percentage, fat mass, lean mass, and general body-fat category from common measurements.
Use Body Fat Calculator
Health results are general estimates for informational use and are not a medical diagnosis.
Details, guidance, and common questions
The working tool stays first. Open these sections only when you need more context.
Body-fat estimates add context that scale weight alone cannot show
Body-fat percentage estimates can be helpful when a person wants more context than scale weight alone, especially for fitness, tracking, or general body-composition awareness.
This calculator combines common measurement-based estimation with fat-mass and lean-mass outputs so the result is easier to interpret in a practical way.
Helpful tips for a better result
- Measure waist, neck, height, and hip carefully because small changes can affect the estimate.
- Use consistent measuring conditions when tracking body-fat changes over time.
- Treat the result as an estimate rather than a clinical measurement.
Frequently asked questions
What does this calculator estimate?
It estimates body fat percentage and can also show related fat-mass and lean-mass values.
Do I need different measurements for men and women?
Yes. Some body-fat formulas use slightly different measurement inputs depending on sex.
Is this as accurate as a clinical test?
No. It is a practical estimate rather than a clinical or laboratory measurement.