Build a BMI Calculator Watch with Arduino Nano and OLED - Understand Your Health at a Glance

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Give young minds a tangible introduction to health monitoring. This kit lets you build a wrist-worn device that takes height and weight inputs via buttons, computes your Body Mass Index instantly, and displays the value with a healthy-range classification on a bright 0.96-inch OLED screen. Instead of just reading about BMI in a textbook, kids wire, code, and wear their own calculator, turning abstract health concepts into a proud, shareable creation.

What You'll Build

A portable BMI calculator watch that makes health tracking fun. After assembly, pressing the tactile buttons toggles between height and weight entry, the Arduino Nano processes the data using the standard BMI formula, and the OLED shows your exact BMI along with a clear message-Underweight, Normal, Overweight, or Obese. The entire circuit rests on a breadboard that can be strapped to the wrist with simple accessories (not included), making it a genuine wearable project.

What You'll Learn

• Wiring tactile buttons as digital inputs and using pull-down resistors
• Reading button states with Arduino's digital pins and debouncing in code
• Implementing the BMI formula in C++ and mapping results to health categories
• Driving a 0.96-inch OLED display over I2C to show real-time numeric data and text

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for school students aged 8 to 15 who are curious about electronics and health science. It fits seamlessly into ATL Tinkering Lab sessions, CBSE classroom demonstrations, and home-based STEM exploration. Parents looking for a meaningful first soldering-free project will find it ideal-it runs on a breadboard, requires no special tools, and builds confidence before moving to more advanced kits.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project - accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.