Contact Lenses Calculator

Easily convert glasses prescriptions to contact lens prescriptions. Designed for simplicity, speed, and clarity, this app helps you calculate accurate contact lens prescriptions in seconds. Whether you're a professional or just curious, it's your go-to tool. Key Features • Simple and Fast Conversion Enter your glasses (spectacle) prescription, and instantly get your contact lens equivalent — including sphere, cylinder, and axis adjustments if needed. • Light and Dark Mode Choose the theme that suits your eyes and environment. Easy on the eyes, day or night. • Save to History All your past calculations are saved for easy reference. View, copy, and manage them anytime. • Clear Visual Guide Not sure what values to enter? Our in-app guide explains SPH, CYL, AXIS, and PD clearly. • Supports Multiple Units Choose between millimeters or diopters for vertex distance adjustments. • Custom Vertex Distance Setting Adjust and calculate using your own back vertex distance for precision results. • Copy & Share Results One-tap copy or share function lets you send results quickly to yourself or others. • Works Offline No internet connection needed. All features work fully offline. • Optimized for All Devices Responsive design for phones and tablets, landscape or portrait. Whether you're checking your own prescription, helping a friend, or working in eye care, this tool simplifies the math so you can focus on clarity.