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Conicity Index Calculator

Calculate your Conicity Index from your waist circumference, weight and height. See how your waist size compares with the cylindrical body-shape reference used by the conicity index formula.

1

Waist circumference

cm
Measure around your waist and enter the circumference in centimeters.
2

Gender

Select your sex for the reference display.
3

Body weight

kg
Enter your current body weight in kilograms.
4

Height

cm
Enter your height in centimeters.

Your estimated Conicity Index:

0.00

Your result will appear after calculation.

Conicity Index Calculator Result

0.00
index
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This calculator is for informational purposes only and does not provide medical or health advice. If you have health concerns, speak with a qualified healthcare professional. Use the result at your own responsibility.
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How Does the Conicity Index Calculator Work?

The Conicity Index Calculator estimates your Conicity Index from waist circumference, body weight and height. The index was developed as an anthropometric measure of central body-fat distribution and compares waist circumference with a theoretical cylindrical body-shape reference. The calculation uses the standard Valdez equation and produces a dimensionless result.

Term What does it mean? In the calculation Why does it matter?
Conicity Index An anthropometric index that describes waist size relative to a theoretical cylindrical body-shape reference. Dimensionless result It provides a way to describe the relationship between waist circumference, body weight and height.
Waist circumference The circumference measured around the waist, entered in centimeters and converted to meters for the equation. Waist in meters Waist circumference is the primary body-size measurement used by the Conicity Index.
Body weight Your current body mass measured in kilograms. Weight in kg Body weight forms part of the theoretical cylindrical reference used in the denominator.
Height Your standing height measured in centimeters and converted to meters. Height in meters Height helps establish the expected reference circumference for the mathematical model.
Gender The sex selected by the user for contextual display. Not used in equation The original Conicity Index equation does not contain a sex-specific coefficient.

1. Convert the measurements

Waist circumference and height are entered in centimeters but converted to meters before the equation is applied. Weight remains in kilograms.

2. Apply the Valdez equation

The calculator divides waist circumference in meters by 0.109 multiplied by the square root of body weight in kilograms divided by height in meters. This produces the dimensionless Conicity Index.

3. Interpret the result carefully

A higher value means the measured waist is larger relative to the cylindrical reference represented by the equation. The result is an anthropometric estimate and should not be used by itself to diagnose a health condition.

Conicity Index formula:
CI = waist circumference (m) ÷ [0.109 × √(weight (kg) ÷ height (m))]

Example:
If waist circumference is 90 cm, body weight is 70 kg and height is 1.75 m:

CI = 0.90 ÷ [0.109 × √(70 ÷ 1.75)]

The resulting value is approximately 0.91.

The Conicity Index is an anthropometric measurement rather than a diagnosis or standalone health assessment. Results can be affected by measurement technique, posture, breathing and the exact anatomical location used for waist measurement. If you have health concerns or questions about what the result means for you personally, speak with a qualified healthcare professional.

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Fitness Calculators
Conicity Index Calculator

Conicity Index Calculator estimates your Conicity Index from waist circumference, body weight and height using the standard Valdez equation. The result describes how your waist circumference compares with a theoretical cylindrical body-shape reference. A higher value indicates a relatively larger waist compared with that reference, but the index is not a standalone diagnosis or health assessment. Use the result as an informational body-composition metric and consider measurement technique when interpreting it.

Medical Disclaimer: The calculator results and information provided in this article are for educational and informational purposes only and do not constitute medical, health, or professional advice. Always consult with a qualified healthcare provider before making any decisions related to your health, diet, or fitness goals. Individual results may vary, and this tool should not be used to diagnose or treat any medical condition.

What is the Conicity Index?

The Conicity Index is an anthropometric measure that compares waist circumference with a theoretical cylindrical body-shape reference based on height and body weight. It was developed to describe central body shape and fat distribution. The result is a dimensionless number rather than a percentage.

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How is the Conicity Index calculated?

The Conicity Index is calculated by dividing waist circumference in meters by 0.109 multiplied by the square root of body weight in kilograms divided by height in meters. The standard equation is CI = waist circumference (m) ÷ [0.109 × √(weight (kg) ÷ height (m))]. The formula produces a single dimensionless index.

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What does a higher Conicity Index mean?

A higher Conicity Index means the measured waist circumference is larger relative to the theoretical cylindrical reference represented by the equation. It can therefore indicate a more centralized body shape compared with someone with a lower value. However, the result should not be interpreted as a diagnosis or used alone to determine health status.

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Does the Conicity Index use waist circumference?

Yes, waist circumference is the key measurement in the Conicity Index equation. The measurement is entered in centimeters and converted to meters before the calculation is performed. Consistent measurement technique is important because differences in measurement location or posture can change the result.

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Does gender affect the Conicity Index calculation?

The original Conicity Index equation does not include a sex-specific coefficient. This means the mathematical calculation itself uses waist circumference, weight and height rather than a separate male or female formula. Gender can still be collected for contextual analysis, but it does not alter the standard equation.

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Is the Conicity Index a good measure of body fat?

The Conicity Index is an anthropometric measure related to body shape and central fat distribution rather than a direct measurement of total body-fat percentage. It can provide additional information alongside other measurements such as waist circumference, BMI or body-fat estimates. It should not be treated as a standalone assessment of health or body composition.

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