female, 165 cm height
- Fat mass
- 20.2227972304 kg
- Lean mass
- 47.7772027696 kg
- Method
- Circumference tape
Body Fat Calculator
Use this free body fat calculator to estimate body fat percentage, fat mass, and lean mass from circumference measurements.
Research-based formula Estimate limits shown Examples included Private history
Formula steps
- Convert tape measurements to inches for the circumference equation.
- Use waist plus hip minus neck with height in the female equation.
- Treat the result as an estimate for trend tracking.
How to use the body fat calculator
- Enter the requested measurements, dates, lab values, or workout details.
- Check that the units and formula assumptions match what the tool is asking for.
- Press the calculate button to see the answer, supporting metrics, and formula steps.
- Read the estimate with the health disclaimer in mind, then copy the result if you need it for notes.
Common uses
Estimate body fat percentage without a scale that measures body composition.
Track tape-measure changes over time.
Compare estimated fat mass and lean mass.
Use alongside BMI for a broader screening picture.
Examples
Estimated body fat percent
Estimated body fat percent
Compare estimated change
Frequently asked questions
Quick answers about formulas, inputs, estimate limits, professional guidance, examples, and private in-browser history.
What can I use the Body Fat Calculator for?
Use it for quick educational estimates, planning, comparison, and trend checks. Health and fitness results should be interpreted with context, not as a diagnosis.
How does the Body Fat Calculator calculate the result?
The calculator uses the common circumference method: height, neck, and waist for the male equation, and height, neck, waist, and hips for the female equation.
Is this medical advice?
No. This page provides an educational estimate only. Talk with a qualified health professional before making medical, pregnancy, nutrition, medication, or safety decisions.
Are my health inputs private?
Yes. The calculator runs in your browser tab. Recent answers stay only on the page while you use it and are not sent to a server.