Body Fat Calculator

Calculate your body fat percentage using proven methods like US Navy formula. Get detailed body composition analysis and personalized recommendations.

Calculator

Calculator Details

Enter your information to calculate results

Calculation Method

Unit System

Gender

Weight (kg)

Height (cm)

Neck (cm)

Waist (cm)

Results

18.6%

Body Fat Percentage

Average

EssentialAthleticFitnessAverageObese

Fat Mass

13.0 kg

Total body fat weight

Lean Mass

57.0 kg

Muscle, bone, organs

Body Composition Breakdown

Total Weight:70 kg

Fat Mass:13.0 kg (18.6%)

Lean Mass:57.0 kg (81.4%)

How It Works

How Body Fat is Calculated

US Navy Method

Uses circumference measurements (neck, waist, hip) with logarithmic formulas for accurate estimation

BMI-Based Method

Uses Deurenberg formula incorporating BMI, age, and gender for body fat estimation

Body Composition

Calculates fat mass and lean mass based on total weight and body fat percentage

Examples

Example 1: Athletic Male

Weight/Height:80kg, 180cm

Neck/Waist:38cm, 82cm

Method:US Navy

Body Fat:12.5% (Athletic)

Example 2: Fitness Female

Weight/Height:65kg, 165cm

Neck/Waist/Hip:32cm, 75cm, 95cm

Method:US Navy

Body Fat:22.1% (Fitness)

Compare

Body Fat Measurement Methods Comparison

Method	Accuracy	Cost	Requirements	Pros/Cons
DEXA Scan	Very High	High	Medical facility	Most accurate, expensive
Hydrostatic	High	Medium	Special equipment	Very accurate, inconvenient
US Navy	Good	Free	Tape measure	Convenient, reasonably accurate
BMI-based	Fair	Free	Height, weight, age	Very convenient, less accurate
Bioelectrical	Fair	Low	BIA scale	Easy to use, affected by hydration