Ponderal Index Calculator Explained

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Last updated: December 24, 2023

PI – Ponderal Index Calculator

What is a ponderal index calculator?

The Ponderal Index (PI) calculator is a simple tool for calculating your ponderal index and checking your weight classification based on age, weight, and height.

What is the ponderal index?

The Ponderal Index (PI), also known as the Corpulence Index or Rohrer's Index[1], is a better version of the body mass index (BMI) that also helps you check your weight classifications, whether underweight, normal, overweight, or obese.

It uses a mathematical formula that calculates your relative body mass based on height and weight. To get your PI, take the cube root of your weight, divide it by height, and multiply the result by 100. [2]

We strive to make our calculator apps as accurate as possible, but they cannot replace a professional doctor. Our website provides information for informational purposes, and it's not medical advice. Please consult your healthcare provider before making any decisions based on the results provided by our tool.

User Guide

This guide provides step-by-step instructions for using our calculator.

PI – Ponderal Index Calculator

How do you use the Ponderal index calculator?

To calculate the body adiposity index or BAI using our calculator, use the following steps:

  1. Check your preferred unit system.
  2. Choose whether Adult or child.
  3. Enter your weight.
  4. Enter your height.

Ponderal Index - Input Fields

When you fill in all the required information, our PI calculator will calculate and show your body pondernal index classification and value in kg/m³.

Ponderal Index - Results

With that result, you can check and compare your weight status based on your PI value from the table under the calculator.

Ponderal Index - Classifications

Calculation Features

Our calculator has some essential features to help you fill in your information and get the result as quickly as possible.

Type, Click, or Swipe

We developed the calculator to accept all interaction methods to speed up your information-filling process. In most input fields, you don't need to use the keyboard. You can use the mouse or finger to adjust the field value by swiping within a predefined range.

Assisted information-filling

More ways to adjust the value

Some calculators also offer a range of preset values, which you can quickly enter by clicking the associated button.

Preset Values

You can fill the field with preset values.

Metric or Imperial Unit

Each calculator has a unit switcher button right under the form. The calculator switches between the metric and imperial systems when you click or tap on it. All input values are converted to an appropriate target unit (e.g., cm to feet, in).

Health Calculator - Unit System Switcher

Convert values between metric and imperial systems.

Reload the form

Click the refresh icon or button under the form to calculate new information.

Health Calculator - Reload the form


Our calculator provides personalization features, allowing users to customize the user interface to match their preferences.

Change dark mode

By default, our calculator dark mode follows your system's preference. However, you can change it by opening the Settings menu and turning on/off the dark mode switch.

Health Calculator - Change Dark Mode

Open the Settings menu and toggle the dark mode switch.

Change theme color

Our calculator comes with several theme colors to match your preferences. You can change them by opening the Settings > Theme menu and selecting your favorite color.

Health Calculator - Change Theme Color

Open the Settings menu, open the Theme menu, and select a color.

PI – Ponderal Index Calculator

PI – Ponderal Index Calculator App

About this app

Our ponderal index calculator is an easy-to-use tool to calculate your ponderal or corpulence index value. Just input weight and height to get an accurate result with your body weight information.

App availability

You can use the calculator for free as a PWA web app online or install it locally on any modern operating system, including Android, iOS, Windows 11/10, and macOS.

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2 Sources

  1. ⬆️ Wikipedia Contributors. Corpulence index. Wikipedia. Published February 11, 2024. Accessed March 23, 2024.

  2. ⬆️ “Ponderal index.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, . Accessed 23 Mar. 2024.