Calculate Conicity Index, waist circumference, height, or body weight from any 3 values with cm/in and kg/lb units, finding the missing one.
Customize This Calculator
Build your own version. Describe what you want changed, added, or compared.
- All Health and Medical Calculators
- Corpulence Index Calculator
- Waist to Height Ratio Calculator
- BMI Calculator
- Body Fat Calculator
- BAI Body Adiposity Index Calculator
- Ideal Weight Calculator
Conicity Index Formula
The conicity index estimates how much your body shape resembles a double cone, using waist circumference, height, and body weight. The calculator converts waist and height to meters and body weight to kilograms before applying the formula.
- CI = conicity index
- WC = waist circumference in meters
- BW = body weight in kilograms
- H = height in meters
- 0.109 = constant used in the Valdez conicity index equation
If you enter waist circumference, height, and body weight, the calculator solves for conicity index.
If you leave waist circumference blank, the calculator rearranges the formula to solve for waist circumference.
If you leave height blank, the calculator rearranges the formula to solve for height.
If you leave body weight blank, the calculator rearranges the formula to solve for body weight.
Conicity Index Result Ranges
Conicity index interpretation can vary by study population, sex, age, and health outcome being evaluated. The ranges below are general reference bands, not a medical diagnosis.
| Conicity index | General interpretation |
|---|---|
| About 1.00 | Lower abdominal concentration relative to height and weight |
| 1.10 to 1.20 | Moderate waist concentration |
| 1.20 to 1.30 | Higher abdominal concentration |
| Above 1.30 | Very high abdominal concentration relative to height and weight |
Unit Conversions Used
| Measurement | Accepted units | Base unit used in formula |
|---|---|---|
| Waist circumference | cm, m, in | meters |
| Height | cm, m, in | meters |
| Body weight | kg, lb | kilograms |
Example Calculations
Example 1: Calculate conicity index
Suppose your waist circumference is 90 cm, height is 175 cm, and body weight is 80 kg.
Convert the length values to meters:
- WC = 90 cm = 0.90 m
- H = 175 cm = 1.75 m
- BW = 80 kg
The conicity index is approximately 1.2210.
Example 2: Calculate waist circumference
Suppose the conicity index is 1.20, height is 1.70 m, and body weight is 70 kg.
Convert meters to centimeters:
The waist circumference is approximately 83.90 cm.
FAQ
What does a higher conicity index mean?
A higher conicity index means waist circumference is larger relative to height and body weight. In practical terms, it suggests more abdominal concentration of body size. It does not diagnose a condition by itself, but it can be used along with other health measurements.
Where should waist circumference be measured?
Waist circumference is commonly measured around the abdomen at a consistent anatomical point, such as midway between the lowest rib and the top of the hip bone, or at the level of the navel depending on the measurement protocol being used. Use the same method each time if you are comparing results over time.
Why does the calculator require exactly three values?
The conicity index equation has four variables: waist circumference, height, body weight, and conicity index. If you provide any three, the missing one can be calculated by rearranging the same formula. If more than one value is missing, there is not enough information to solve the equation.
