Free Online Body Fat Calculator - US Navy Method

Getting Started

Using the Body Fat Calculator is simple. Follow these steps to calculate your body fat percentage:

Basic Usage

1. Select Gender: Choose male or female as the calculation formulas differ.
2. Select Unit System: Choose between metric (cm/kg) or imperial (inches/lbs).
3. Enter Measurements: Input your height, weight, and body measurements.
4. Calculate: Click the calculate button to get your results instantly.

Required Measurements

For Males:

• Height: Your total height
• Weight: Your current body weight
• Neck: Circumference at the narrowest point
• Waist: Circumference at the navel level

For Females:

• Height: Your total height
• Weight: Your current body weight
• Neck: Circumference at the narrowest point
• Waist: Circumference at the narrowest point
• Hip: Circumference at the widest point

Understanding Results

• Body Fat Percentage: The proportion of your body weight that is fat
• Lean Body Mass: Your weight minus body fat (muscle, bone, organs, water)
• Body Fat Mass: The actual weight of fat in your body
• Category: Health classification based on your body fat percentage

Body Fat Categories

For Males:

• Essential Fat: 2-5% (Athletes only)
• Athletes: 6-13%
• Fitness: 14-17%
• Average: 18-24%
• Obese: 25%+

For Females:

• Essential Fat: 10-13%
• Athletes: 14-20%
• Fitness: 21-24%
• Average: 25-31%
• Obese: 32%+

Tips for Accurate Measurements

• Measure at the same time of day, preferably in the morning
• Use a flexible measuring tape
• Keep the tape snug but not tight
• Measure directly on skin, not over clothing
• Take measurements while standing relaxed
• Record measurements to track progress over time