Body Fat Calculator

Dynamic Body Fat Calculator

Body Fat Calculator

Uses the U.S. Navy method (tape). Slide to adjust, results update live.
Profile
Units

Tip: Stand straight, no shoes
cm
Measure just below the larynx
cm
Neck must be less than waist (and waist+hip for female).
At navel level, relaxed
cm
To estimate lean/fat mass & BMI
kg
Results
Body Fat
–%
Category
BMI
Fat Mass
Lean Mass
Est. Range

Body Fat Calculator Guide

How It Works

While BMI measures general weight, Body Fat Percentage distinguishes between fat mass and lean muscle mass. This calculator uses the US Navy Method, which relies on body circumference measurements for high accuracy.

Method US Navy Circumference
Inputs Height, Waist, Neck ( & Hips for Women)
More accurate than BMI for athletes
Example Calculation

Calculation for an average Male subject:

Height
175 cm
Waist
85 cm
Neck
40 cm
Body Fat ≈ 18%
Category: Fitness / Athletic
Benefits & Use Cases
Track Fitness

Monitor if your weight loss is actually fat loss or just water/muscle weight.

For Athletes

BMI often misclassifies muscular people as overweight. This tool fixes that.

Health Risks

High visceral fat is linked to heart disease. Knowing your % helps prevention.

Frequently Asked Questions
Q1: Is Body Fat % better than BMI?

Yes. BMI only looks at height vs weight. Body fat percentage tells you how much of that weight is actual fat versus muscle and bone.

Q2: What is a healthy range?

It varies by age and gender. Generally, Men: 10–20% and Women: 18–28% are considered healthy ranges.

Q3: Which method is used here?

This tool uses the US Navy Circumference Method, widely regarded as a practical and accurate way to estimate body fat without expensive equipment.

Q4: Do athletes have lower body fat?

Yes, athletes typically maintain lower body fat percentages (e.g., 6–13% for men) to enhance performance and agility.

Authority Sources: NIH