Body Fat Calculator – Estimate Your Body Fat Percentage Online Free

Calculate your body fat percentage using the U.S. Navy method. 100% free · Instant results · Works in your browser.

Gender

Male Female

Height

Weight (lbs)

Waist Measurement (inches)

Neck Measurement (inches)

Hip Measurement (inches, females only)

BMI: –

Body Fat Percentage: –

Lean Body Mass: –

Fat Mass: –

How to Use Body Fat Calculator (3 Easy Steps)

Enter your gender, height, weight, and measurements (waist, neck, and hip for females)
Ensure measurements are taken at the correct spots (e.g., waist at navel)
Click “Calculate” – see your body fat percentage and other metrics instantly

Is this body fat calculator free?

Yes – 100% free, unlimited use, no signup required.

How accurate is the U.S. Navy method?

It’s a reliable estimate but less precise than DEXA scans or hydrostatic weighing.

Where should I measure?

Waist at navel (men/women), neck below Adam’s apple, hips at widest point (women only).

What is a healthy body fat percentage?

Men: 8–19% (athletic), 20–25% (average). Women: 21–33% (athletic), 34–39% (average).

Why is BMI included?

BMI provides context but isn’t as specific as body fat for assessing health.