Enter the waist circumference, height, and body weight into the calculator to determine the Conicity Index. This calculator can also evaluate any of the variables given the other three are known.

Conicity Index Calculator

Enter any 3 values to calculate the missing variable

Conicity Index Formula

The following formula is used to calculate the Conicity Index.

CI = \frac{WC}{0.109 \cdot \sqrt{\frac{BW}{H}}}

Variables:

  • CI is the Conicity Index (unitless)
  • WC is the waist circumference (m)
  • BW is the body weight (kg)
  • H is the height (m)

To calculate the Conicity Index, divide the waist circumference by the product of 0.109 and the square root of body weight divided by height.

What is a Conicity Index?

The Conicity Index is a mathematical calculation used to assess central (abdominal) obesity by relating waist circumference to body weight and height. It is often used in medical and health research to study obesity and related health risks. A higher Conicity Index generally indicates a greater concentration of body mass around the waist, which is associated with increased cardiometabolic risk.

How to Calculate Conicity Index?

The following steps outline how to calculate the Conicity Index (CI).


  1. First, determine the waist circumference (WC) in meters (m).
  2. Next, determine the body weight (BW) in kilograms (kg).
  3. Next, determine the height (H) in meters (m).
  4. Next, calculate the ratio inside the square root: BW / H.
  5. Next, take the square root of the ratio and multiply by 0.109.
  6. Finally, divide the waist circumference (WC) by the result obtained in the previous step to calculate the Conicity Index (CI).

Example Problem:

Use the following variables as an example problem to test your knowledge.

Waist circumference (WC) = 80 cm

Body weight (BW) = 70 kg

Height (H) = 175 cm