Body Fat Calculator — Estimate Your Body Composition — USA 2026
Calculate your body fat percentage using the US Navy method. Just enter your measurements to get an estimate of your body composition without special.
Body fat percentage is a more useful health metric than weight alone or BMI because it distinguishes between fat and muscle mass. An athletic person weighing 90 kg with 15% body fat is far healthier than a sedentary person weighing 75 kg with 30% body fat even though the first person is heavier. The US Navy method provides a reasonably accurate estimate using just neck waist and hip measurements requiring no special equipment.
How accurate is the US Navy body fat method?
The US Navy method is accurate within 3-4% of DEXA scan results for most people which is sufficient for tracking progress and general health assessment. It tends to overestimate body fat in very muscular individuals and underestimate in those with apple-shaped body types. For clinical accuracy DEXA scans or hydrostatic weighing are gold standards but cost $50-$150 per test.
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Body Fat Calculator (US Navy Method)
About This Health Metric
This calculator uses established medical formulas to estimate your health metrics. While these calculations provide useful benchmarks for general health monitoring, they are based on population averages and may not account for individual factors such as body composition, genetics, medical conditions, or fitness level. Athletes, pregnant women, and individuals with certain health conditions may get results that do not accurately reflect their actual health status. Always consult a healthcare professional for personalized medical advice.
Key Information
| Parameter | Details |
|---|---|
| Healthy Range (Men) | 10% - 20% body fat |
| Healthy Range (Women) | 18% - 28% body fat |
| Athletic Range (Men) | 6% - 13% body fat |
| Athletic Range (Women) | 14% - 20% body fat |
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Use Calculator NowFrequently Asked Questions
How accurate is the US Navy body fat method?
The US Navy method is accurate within 3-4% of DEXA scan results for most people which is sufficient for tracking progress and general health assessment. It tends to overestimate body fat in very muscular individuals and underestimate in those with apple-shaped body types. For clinical accuracy DEXA scans or hydrostatic weighing are gold standards but cost $50-$150 per test.
What body fat percentage do you need for visible abs?
For men visible abs typically appear at 10-14% body fat. A well-defined six-pack requires below 10%. For women abs become visible at 16-20% body fat. Reaching these levels requires consistent caloric deficit progressive resistance training and patience. Most people need 3-6 months of focused effort to go from average body fat levels to visible abs.
How to reduce body fat percentage?
Focus on three pillars: caloric deficit of 300-500 calories daily (not extreme restriction) strength training 3-4 times per week to preserve muscle mass and adequate protein intake (1.6-2.2 grams per kg of bodyweight). Cardio helps but is not essential. Sleep 7-9 hours and manage stress as cortisol promotes fat storage. Track body fat monthly rather than daily weight for meaningful progress measurement.
How accurate are online health calculators?
Online health calculators use established medical formulas and provide useful estimates for general guidance. However, individual factors like metabolism, medical conditions, and body composition can affect actual results. Always consult a healthcare professional for personalized advice.
What is a healthy BMI range?
BMI between 18.5-24.9 is normal weight. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese. BMI does not distinguish between muscle and fat, so athletes may show higher BMI without being overweight.
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Last updated: March 2026