Ponderal Index Calculator
Calculate your Ponderal Index (Rohrer's Index) - an alternative measure of body leanness using our free online tool.
Disclaimer: This calculator is for informational purposes only and not intended to replace professional medical advice. Consult a healthcare provider for proper evaluation of your health status. Results should not be used for self-diagnosis or treatment decisions.
Your Ponderal Index Results
Weight:
Height:
Ponderal Index: kg/m³
Classification:
What is the Ponderal Index?
The Ponderal Index (PI), also known as the Rohrer's Index or Corpulence Index, is a measure of leanness of a person calculated as a relationship between mass and height. Unlike the Body Mass Index (BMI) which divides the weight by the square of the height, the Ponderal Index divides the weight by the cube of the height.
Formula
The Ponderal Index is calculated using the following formula:
PI = Weight (kg) ÷ Height³ (m³)
Interpretation
Ponderal Index values typically range from approximately 10 to 20 kg/m³ for adults. Generally:
- Less than 11 kg/m³: Underweight
- 11 - 13 kg/m³: Normal weight
- 13 - 14 kg/m³: Overweight
- Above 14 kg/m³: Obese
Benefits of Ponderal Index vs BMI
Some researchers suggest that the Ponderal Index may have advantages over BMI:
- May be better suited for taller individuals
- Potentially more accurate for assessing body composition in certain populations
- Takes into account the three-dimensional nature of the human body
- Can provide additional insight when used alongside BMI measurements
Common Uses
- Research studies on body composition
- Complementary measurement to BMI for health assessments
- Evaluating growth patterns in children and adolescents
- Tracking body composition changes over time
Remember that like BMI, the Ponderal Index is a screening tool and not a diagnostic measurement. Individual health assessments should consider multiple factors and be performed by healthcare professionals.