I Built a Free BMI, BMR, Calorie & Ideal Weight Calculator Using React and Tailwind CSS

Source: Dev.to

Introduction

As a student developer passionate about health tech and web development, I built TheFitCalculator – a free online tool that instantly calculates BMI, BMR, daily calorie needs, and ideal weight.

👉 Try it here: https://thefitcalculator.com

Goals

• Fast calculations
• Clean UI
• No data storage
• Fully browser‑based processing

Tech Stack

• React.js – component‑based UI
• Tailwind CSS – responsive design
• JavaScript – calculation logic
• Vercel – deployment

Features

• ✅ BMI Calculator with health category
• ✅ BMR Calculator using standard formulas
• ✅ Daily calorie needs estimator
• ✅ Ideal weight calculator
• ✅ Dark mode support
• ✅ Mobile‑responsive design

Explore the calculators:

• BMI Calculator → https://thefitcalculator.com/bmi-calculator
• BMR Calculator → https://thefitcalculator.com/bmr-calculator
• Calorie Calculator → https://thefitcalculator.com/calorie-calculator
• Ideal Weight Calculator → https://thefitcalculator.com/ideal-weight-calculator

Future Improvements

• Body fat calculator
• Water intake calculator
• Fitness blog section
• PWA support

Feedback

Feedback from the developer community is welcome.

👉 Check it out: https://thefitcalculator.com

👉 GitHub repo: https://github.com/swetasingh8844/HealthCalc