Body Fat % Calculator

Estimate your using the . All you need is a tape measure and a few simple body measurements. No special equipment required.

Gender

Waist circumference

Neck circumference

Height

This calculator provides estimates for educational purposes only. It is not medical advice. Always consult a healthcare professional before making changes to your diet or exercise routine.

What Is Body Fat Percentage?

is the proportion of your total body weight that comes from fat tissue. Unlike a scale reading or even , body fat percentage separates fat mass from — which includes muscle, bone, water, and organs. This distinction makes it a far more accurate indicator of health and fitness than weight alone.

Two people can weigh the same and stand the same height yet have dramatically different body compositions. One might carry 15% body fat with significant muscle mass, while the other carries 30% body fat with minimal muscle. Their health risks, energy levels, and physical capabilities will differ substantially, even though their BMI is identical.

Tracking body fat percentage gives you a clearer picture of what is actually changing when you adjust your diet and training. Losing fat while preserving or building muscle is the goal for most people — and body fat percentage is the metric that reveals whether you are achieving it.

How Is It Measured?

There are several methods for estimating body fat, each with different trade-offs between accuracy, cost, and convenience:

: Uses circumference measurements (neck, waist, and hips for women) along with height. It is free, requires only a tape measure, and provides a reasonable estimate for most people. This is the method used by our calculator.
Skinfold Calipers: A trained technician pinches skin at specific body sites and measures the thickness. Accuracy depends heavily on the skill of the person performing the test.
DEXA Scan: Dual-energy X-ray absorptiometry is considered the gold standard. It provides a detailed breakdown of fat, muscle, and bone — but it requires a clinic visit and can be expensive.
Bioelectrical Impedance (BIA): Found in many smart scales, BIA sends a small electrical current through the body. Results can vary significantly based on hydration, meal timing, and device quality.

What Do the Results Mean?

Healthy body fat ranges differ by gender and age. Below are general guidelines for adults:

Essential fat: 2–5% (men) / 10–13% (women)
Athletic: 6–13% (men) / 14–20% (women)
Fit: 14–17% (men) / 21–24% (women)
Average: 18–24% (men) / 25–31% (women)
Above average: 25%+ (men) / 32%+ (women)

Essential fat is the minimum required for basic physiological function. Dropping below these levels can impair hormonal health, immune function, and organ protection.

Tips for Reducing Body Fat

Focus on a moderate calorie deficit rather than extreme restriction. Losing 0.5–1% of body weight per week helps preserve muscle.
Prioritize resistance training to maintain or build while in a deficit.
Keep protein intake high — generally 1.6 to 2.2 grams per kilogram of body weight — to support muscle retention.
Measure consistently. Take circumference readings at the same time of day, under the same conditions, for the most reliable trend data.

Related Calculators

Compare your result with your BMI score to see how the two metrics tell different stories, or check your Lean Body Mass to understand exactly how much of your weight is muscle, bone, and organs.