Body Fat (3 Skinfolds) Calculator

How much of my weight is fat (using 3 skinfold measurements)?

Calculating your body fat percentage by taking some measurements from the fat-storing zones will reveal your fitness level more accurately than scale weight alone. Combine these measurements with your gender, weight, and age and this calculator will find your percent of body fat, how much of your weight is lean mass and how much is fat mass, and your general fitness category.While the water displacement test is the most accurate way to determine body fat percent, skinfold tests are valuable because they can be done at home with the same person measuring each time, providing good measurements to monitor body composition changes over time.

Field Help

Input Fields

Title: A title for these calculator results that will help you identify it if you have printed out several versions of the calculator.

US/Metric: Choose US or Metric units.

Gender: Select your gender.

Age: Your current age.

Weight: Your current scale weight.


Use calipers to measure a vertical fold directly on the back of the upper arm and halfway between the shoulder and elbow.   


Use calipers to measure a vertical fold directly on the front of the upper leg and halfway between the knee and the crease created when you lift your leg.   


Use calipers to measure a diagonal fold directly above the hipbone. The angle of the fold should be about the same angle as the hipbone.   

Output Fields

Body Fat: The approximate percentage of your body’s mass that is made up of fat.

Fat Mass: The portion of your weight that is fat.

Lean Mass: The portion of your weight that is lean (not fat).

Body Fat Category: Your body fat category depends on your gender and your body fat percentage.

Body Fat Categories Table: This table shows you the Body Fat Range for each Classification so you can see how close your calculated Body Fat percentage is to the next Body Fat Classification range.

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