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Free Body Fat Calculator Online tool

100% Free online tool to Calculate your body fat percentage with our free online Body Fat Calculator. Determine Fat Mass, Lean Mass, and accurate metabolic rate.

Measurements

Male

Female

Age

Weight (KG)

Height (CM)

Neck Circumference (CM)

Measure below the Adam's apple.

Waist Circumference (CM)

Measure at the navel (belly button).

BODY COMPOSITION

Ready to Analyze

Enter your measurements to see a detailed breakdown of your fat vs. muscle mass.

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Beyond the Scale

Why Body Fat Percentage matters more than Weight.

BMI vs Body Fat

BMI only looks at height and weight. Body Fat percentage tells the truth: are you carrying muscle or excess fat? Essential for "Skinny Fat" analysis.

Accurate Calories

Muscle burns more calories than fat. Knowing your Lean Body Mass allows us to use the Katch-McArdle formula for a precise calorie target.

US Navy Method

We use the US Navy circumference method. It is widely considered the most accurate way to estimate body fat without expensive scanning equipment.