Navy Body Fat Calculator
Enter measurements to estimate body fat percentage.
Male: 86.010*log10(waist-neck) - 70.041*log10(height) + 36.76. Female: 163.205*log10(waist+hip-neck) - 97.684*log10(height) - 78.387.
Male: neck 40cm, waist 90cm, height 175cm -> ~20.5%.
What measurements are needed?
Men: neck, waist, height. Women: neck, waist, hip, height. Use consistent units.
How accurate is the Navy method?
It is an accessible estimate based on circumferences. DEXA/hydrostatic weighing are more precise but less accessible.
Where should I measure?
Follow standardized positions: neck below larynx; waist at navel (men) or narrowest (women); hips at widest.
Do I need to fast or measure at a specific time?
For consistency, measure at the same time of day and before large meals/hydration swings.
What measurements are required?
Male: Neck, Waist, Height. Female: Neck, Waist, Hip, Height.
📐 Formula
Male: 86.010*log10(waist-neck) - 70.041*log10(height) + 36.76. Female: 163.205*log10(waist+hip-neck) - 97.684*log10(height) - 78.387.
📝 Example Calculation
Male: neck 40cm, waist 90cm, height 175cm -> ~20.5%.
❓ Frequently Asked Questions
What measurements are needed?▼
Men: neck, waist, height. Women: neck, waist, hip, height. Use consistent units.
How accurate is the Navy method?▼
It is an accessible estimate based on circumferences. DEXA/hydrostatic weighing are more precise but less accessible.
Where should I measure?▼
Follow standardized positions: neck below larynx; waist at navel (men) or narrowest (women); hips at widest.
Do I need to fast or measure at a specific time?▼
For consistency, measure at the same time of day and before large meals/hydration swings.
What measurements are required?▼
Male: Neck, Waist, Height. Female: Neck, Waist, Hip, Height.