Body Fat Calculator.
Estimate your body fat percentage using simple body measurements.
What Is Body Fat Percentage?.
Body fat percentage estimates the share of your total body mass that is fat. Essential fat supports normal body functions, while stored fat provides energy and insulation.
How Does the Body Fat Calculator Work?.
The U.S. Navy method uses height and body circumferences. It applies a logarithmic formula to estimate body density patterns. For men it uses neck and waist; for women it also uses hip circumference.
Body Fat Percentage vs BMI.
BMI compares weight with height, while body fat percentage aims to describe body composition. Neither measure is a diagnosis. You can compare the two with the BMI Calculator.
Why Body Fat Estimates Can Vary.
Tape placement, posture, breathing, hydration and natural differences in body shape can all change the result. Measure consistently and treat the number as an estimate rather than an exact measurement.
General Reference Ranges.
| Category | Male | Female |
|---|---|---|
| Essential Fat | 2–5% | 10–13% |
| Athletes | 6–13% | 14–20% |
| Fitness | 14–17% | 21–24% |
| Average | 18–24% | 25–31% |
| Higher Body Fat | 25%+ | 32%+ |
Frequently Asked Questions.
What is a healthy body fat percentage?+
Healthy ranges vary with age, sex and individual circumstances; reference categories are only general guides.
Is this calculator accurate?+
It is an estimate. Professional methods and consistent tape measurements may provide different results.
Is BMI the same as body fat percentage?+
No. BMI compares weight and height; body fat percentage estimates body composition.
Why can measurements affect the result?+
Small differences in tape position, tension and posture change circumference values and therefore the estimate.