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.