Free · Browser-Based · Fitness Metric

Body Fat Calculator

Estimate body fat percentage using the U.S. Navy method with circumference-based inputs for quick fitness tracking and progress checks.

Sex

Height (cm)

Neck (cm)

Waist (cm)

Hip (cm, women only)

Interpretation

Body fat summary

🎯 Common Use Cases

Track physique changes

Compare fitness progress beyond BMI

Estimate body-fat trend at home

Use simple circumference measurements

Is this as accurate as a scan?

No. This is a convenient estimate, not a lab-grade or DEXA measurement.

Why is hip measurement optional?

The Navy formula uses hip circumference for women but not for men.

Does it stay in my browser?

Yes. All calculations are local.