Reverse FFMI Calculator

A web app that calculates your target body weight based on height, desired body fat percentage, and target normalized FFMI (Fat-Free Mass Index).

Features

• Reverse FFMI calculation - Input your goals, get your target weight
• Smooth slider inputs - Drag or scroll with mouse wheel to adjust values
• Imperial/Metric toggle - Switch between units with automatic value conversion
• Real-time results - See total weight, lean mass, and fat mass instantly

Getting Started

npm install
npm run dev

Open http://localhost:3000 in your browser.

Deploy to Vercel

npm run build

Or connect your GitHub repo to Vercel for automatic deployments.

Tech Stack

• Next.js 14
• TypeScript
• Tailwind CSS