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Body Fat Calculator
Calculate body fat percentage using US Navy method with body measurements
Personal Information
Basic Measurements
Body Measurements
Body Fat Percentage
Body Composition
Ideal Range
Body Composition
Quick Summary
Detailed Analysis & Recommendations
How US Navy Body Fat Calculation Works
US Navy Formula (male)
Male: 495 ÷ (1.0324 - 0.19077 × log₁₀(waist - neck) + 0.15456 × log₁₀(height)) - 450
Measurement Requirements
Men need neck and waist measurements. Neck: 38cm, Waist: 85cm
Body Composition Breakdown
Total weight (70kg) = Fat mass (12.5kg) + Lean mass (57.5kg)
Age-Adjusted Ranges
Ideal body fat ranges adjust with age. For 30-year-old male: 8-19%
Body Fat Management Tips
Fat Loss Strategies:
- • Calorie Deficit: 300-500 calories below maintenance
- • Strength Training: Preserve lean muscle mass
- • Cardio Exercise: 150+ minutes moderate intensity weekly
- • Protein Intake: 1.6-2.2g per kg body weight
Body Composition Tips:
- • Measurement Consistency: Same time of day, conditions
- • Progress Tracking: Monthly measurements, photos
- • Hydration: Affects measurement accuracy
- • Professional Assessment: DEXA scan for accuracy
Your Body Composition Analysis:
Body Fat Calculator FAQs
How accurate is the US Navy body fat method?
The US Navy method is accurate within 3-4% of body fat when measurements are taken correctly. It is one of the most reliable tape-measure methods, though DEXA scans or hydrostatic weighing give more precise results in a clinical setting.
Where exactly should I measure my neck and waist?
Measure your neck just below the Adam's apple, and your waist at the narrowest point (men, usually at navel level). Women should also measure hips at the widest point. Keep the tape snug but not compressing the skin, and measure at the same time of day for consistency.
Why do men and women use different formulas?
Men and women naturally carry and distribute body fat differently, so the US Navy method uses separate formulas: men need neck and waist measurements, while women need neck, waist, and hip measurements for an accurate estimate.
What is a healthy body fat percentage?
For men, athletic ranges are 6-13% and average is 18-24%. For women, athletic ranges are 14-20% and average is 25-31%. Essential fat (below these ranges) is needed for basic health, while higher percentages carry increased health risks.
Is this body fat calculator a substitute for medical advice?
No. This calculator provides an estimate for general fitness tracking only. For precise body composition analysis or health concerns, consult a doctor or use clinical methods like DEXA scanning.
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