Body Fat Calculator: Estimate Body Fat Percentage and Lean Mass

by

A Body Fat Calculator helps you estimate your body fat percentage and lean body mass using body measurements. It can be useful for people tracking fitness progress, learning about body composition, or planning a fitness routine.

Unlike a standard weight measurement, body fat percentage estimates how much of your total body weight is fat. Lean body mass represents the remaining weight, including muscles, bones, organs, and body water.

Body Fat Calculator

Estimate body fat percentage and lean body mass from your measurements.

Choose the formula that best matches the method’s intended use.
Measure around the abdomen as consistently as possible.

This tool uses an estimate based on the U.S. Navy circumference equations. Results are not a diagnosis or a measure of overall health. Accuracy varies with measurement technique and individual characteristics. This method is intended for adults and is not validated for children or teenagers. Consult a qualified healthcare professional for individualized guidance.

How Does a Body Fat Calculator Work?

This calculator uses the U.S. Navy circumference method, which estimates body fat using height and specific body measurements.

  • Body Fat Percentage: The estimated percentage of your body weight that is fat.
  • Lean Body Mass: The estimated weight of everything other than body fat.
  • Waist Measurement: Used as part of the body composition estimate.
  • Neck Measurement: Helps refine the estimate.
  • Hip Measurement: Used in the formula for women.

How to Use the Body Fat Calculator

  1. Select your measurement system, metric or imperial.
  2. Enter your height and the required body measurements.
  3. Select the applicable formula option.
  4. Click calculate to view your estimated body fat percentage and lean body mass.

For better consistency, measure your waist and neck using a flexible measuring tape. The women’s formula also requires a hip measurement.

Important: This method provides an estimate, not a medical diagnosis. Measurement technique and individual body characteristics can affect the result. It is intended for adults, and results should be interpreted cautiously, especially for people under 20.

Leave a Comment