Body Fat Calculator
Estimate your body fat percentage using the US Navy method. This scientifically-...Estimate your body fat percentage using the US Navy method. This scientifically-validated formula uses simple body measurements to calculate body comp...
Updated
Body Measurements
U.S. Navy Method Formula
86.010 x log10(waist - neck) - 70.041 x log10(height) + 36.76163.205 x log10(waist + hip - neck) - 97.684 x log10(height) - 78.387All measurements in centimeters. Imperial values converted automatically (inches x 2.54).
U.S. Navy Method
Clinically validated body fat estimation accurate within 3-4%.
Visual Gauge
See exactly where you fall on the body fat spectrum.
Body Composition
Breakdown of lean mass vs fat mass with weight input.
Health Tips
Personalized recommendations based on your category.
Disclaimer: This calculator uses the U.S. Navy body fat estimation method, which is accurate within 3-4% for most people. Results may vary based on measurement accuracy. For precise body composition analysis, consult a healthcare provider or use methods like DEXA scans.
Body Fat Calculator Features
Accurate body composition estimation
Why Use Body Fat Calculator?
Accurate Estimation
Uses the US Navy body fat formula, a scientifically-validated method that correlates well with more expensive testing methods.
Track Progress
Monitor your body composition changes over time. More useful than weight alone for tracking fitness progress.
Health Insights
Understand where your body fat falls in health categories - from essential fat to obese - and what it means for your health.
Simple Measurements
No special equipment needed. Just a tape measure and accurate measurements of neck, waist, and hips.
Common Use Cases
Track your body composition
Fitness Tracking
Monitor body composition changes during your fitness journey. More meaningful than scale weight when building muscle.
Goal Setting
Set realistic body fat goals based on your current percentage and desired health category. Track progress toward your target.
Health Assessment
Understand where your body fat falls in terms of health risk. Higher body fat percentages correlate with certain health conditions.
Weight Loss Programs
Ensure you're losing fat, not muscle. Body fat tracking helps optimize your diet and exercise for fat loss specifically.
How It Works
Select Gender
Choose male or female. The formula differs because men and women store fat differently.
Enter Height
Input your height in inches or centimeters. Stand straight for accurate measurement.
Measure Circumferences
Measure neck, waist (at navel level), and hips (females only) using a soft tape measure.
Get Results
Click 'Calculate Body Fat' to see your estimated body fat percentage and health category.
Pro Tips for Accurate Measurement
Measure Consistently
Always measure at the same locations, same time of day, and same conditions (before eating, after bathroom). Consistency improves tracking accuracy.
Track Trends Not Single Readings
Don't obsess over individual measurements. Look at trends over weeks and months for meaningful insights about your progress.
Use a Soft Tape Measure
Use a flexible measuring tape, not a metal one. The tape should be snug but not compressing the skin.
Keep a Log
Record your measurements and results over time. This helps you spot trends and stay motivated by seeing progress.
Frequently Asked Questions
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