Use this body-composition measurement as a screening or estimation aid when the required measurements were collected with the method and units stated by the tool.

Body mass (kg)

Required number input.

Corrected measured body volume (L)

Required number input.

Conversion equation

Optional string input.

Calculate density and estimated body composition from body mass and a corrected body volume measured by air-displacement equipment. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Estimated body fat (%)

The resulting estimated body fat returned as a number.

Estimated fat mass (kg)

The resulting estimated fat mass returned as a number.

Estimated fat-free mass (kg)

The resulting estimated fat-free mass returned as a number.

• Population equations and screening indices do not directly diagnose health or measure every body compartment. Hydration, age, sex, ethnicity, athletic build, measurement technique, and the population used to derive an equation can affect interpretation.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Interpret the result with other measurements, trends, medical history, and professional guidance. Use a validated reference method when individual body composition must be measured more directly.

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