Body Mass Index (BMI) Calculation

• Author: Edilberto Fonseca [email protected]
• Creation Date: 08/11/2022
• Version: 2025.7.19
• License: GPL v2
• Last Revised: 22/06/2025

Introduction

Welcome to the BMI Add-on! This is a plug-in designed to help determine Body Mass Index (BMI), an international measure used to assess a person’s body fat level. With this add-on, you can easily calculate your BMI by entering your height and weight.

In addition to BMI calculation, this new version offers extra features such as ideal BMI calculation based on height and a detailed classification according to the World Health Organization (WHO) guidelines, providing personalized health recommendations.

Note: For a proper interpretation of BMI, it's important to consider other factors such as body composition, fat distribution, age, sex, and overall health. It is always advisable to consult a healthcare professional, such as a doctor or nutritionist, for a more accurate assessment and appropriate health and weight guidance.

Installation

Here are the step-by-step instructions to install the BMI Add-on in NVDA:

1. Download the Add-on installation file from the Add-ons Store or from the official BMI page. Note: If the add-on is downloaded from the store, installation will occur automatically. Otherwise, follow the instructions below.
2. Press Enter on the downloaded add-on file.
3. Follow the on-screen instructions to complete the installation.
4. Restart NVDA.
5. Press NVDA+N to open the "Tools" menu and check if the BMI Add-on is listed among the tools.

You're now ready to use the BMI Add-on and calculate your Body Mass Index directly in NVDA.

Settings

There are no configuration instructions for the add-on, as its use is straightforward.

Usage

Press Alt+Windows+I, or use the NVDA menu NVDA+N, Tools > Calculate your BMI, to launch the add-on. A dialog with two input fields will appear:

1. Height – where your height in centimeters (CM) should be selected or entered.
2. Weight – where your weight in kilograms (KG) should be selected or entered.

After filling in all fields, press the Calculate button using the shortcut Alt+A, or press Enter on the calculate button.

NVDA will read out a dialog containing:

• The result of your current BMI calculation.
• Your detailed classification according to WHO parameters (underweight, normal weight, overweight, obesity grade I, II, or III).
• The estimated value of your ideal BMI based on your height.
• A guidance message emphasizing the importance of additional factors in health assessment.

At the end of the dialog, the cursor will be positioned on the OK button. Pressing Enter will reposition the cursor to the height field.

Keyboard Shortcuts

Main Dialog

• Alt+A: Performs the BMI calculation.
• Alt+L: Clears the fields and places the cursor in the height field.
• Alt+H: Displays the calculation history.
• Alt+C: Closes the dialog (you can also use the Esc key).

Acknowledgments

Special thanks to the contributors Rui Fonte, Noelia, and Dalen, whose help made this project possible.

Translators

• Portuguese (Brazil), pt_BR: By Edilberto Fonseca.
• Portuguese (Portugal), pt_PT: By Edilberto Fonseca.
• Russian, ru: By Danil Kostenkov.
• Turkish, tr: By Umut KORKMAZ.