Body Fat Calculator

Check your ratio of lean mass to fat mass with this interactive calculator
Your body fat percentage is simply the percentage of fat your body contains. If you weigh 140 pounds and are 10% fat, it means that your body consists of 14 pounds fat and 126 pounds lean body mass (bone, muscle, organ tissue, blood,...). A certain amount of fat is essential to bodily functions. Fat regulates body temperature, cushions and insulates organs and tissues and is the main form of the body's energy storage.

The formula below will not calculate your exact body fat percentage (+/- 5% error rate). The most accurate way is underwater weighing, but this formula will give you a consistent measurement you can use as a guideline so you can determine if you're losing body fat and/or muscle.

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