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Body Adiposity Index Formula

Calculate the hip-and-height body adiposity index as a limited anthropometric model.

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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Use the result with context

Health results are educational estimates, not a diagnosis or treatment recommendation. A qualified clinician can interpret measurements in the context of your health.

Formula and method

Height 1.6 m and hip circumference 100 cm give BAI approximately 31.41. This is an anthropometric estimate, not a measured body-fat percentage.

BAI = hip (cm) / height (m)^1.5 − 18.

Worked example

Enter these known values and leave the other values blank.

Your height
1.6 m
Your hip circumference
100 cm
Your body adiposity index (BAI)
31.4 %

Assumptions and limitations

  • This adult anthropometric index is not a measured body-fat percentage. Validation studies show important individual and population errors. The retained implementation accepts positive BAI only; do not extrapolate to children or interpret the index as a diagnosis.
  • Use the displayed units and measurements from the same context. Editable fields support arithmetic inverses when enough independent values are supplied. Clear a preset value before solving it as an unknown.
  • This tool performs the stated arithmetic model. It does not establish a diagnosis, prescribe treatment or replace laboratory and clinical assessment.

Common questions

What does this calculation represent?

This adult anthropometric index is not a measured body-fat percentage. Validation studies show important individual and population errors. The retained implementation accepts positive BAI only; do not extrapolate to children or interpret the index as a diagnosis.

Can I solve for a different field?

Clear the unknown field and enter enough independent values in the remaining editable controls. A relationship cannot recover a unique value when a dividing quantity is zero.

References

The calculation equations, inverse formulas, units, and input rules were imported from this source. Bookify provides the interface and equation solver.

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