Prism Effect Calculator

• Online prism effect calculator with four modes: prism diopter ↔ angle conversion, prism deviation (power × distance) calculation, and binocular prism vector synthesis
• Ideal for eyeglass dispensing, optical design, and optometric calculations

1. Open the tool page — no installation needed; it starts in Prism Diopter mode
2. Switch modes at the top and enter the values (or click "Load Example" to fill in sample data)
3. Results update live as you type; click the "Copy" button next to a result to copy it

• This tool is completely free and requires no sign-up
• All calculations run locally in your browser — your data never leaves your device

Free online prism effect calculation tool supporting prism diopter and angle conversion, prism power calculation, prism deviation calculation, and binocular prism synthesis. Ideal for eyeglass dispensing, optical design, and optometric calculations.

Open the tool page — no installation needed; it starts in Prism Diopter mode Switch modes at the top and enter the values (or click "Load Example" to fill in sample data) Results update live as you type; click the "Copy" button next to a result to copy it

This tool is completely free and requires no sign-up All calculations run locally in your browser — your data never leaves your device

Yes, Prism Effect Calculator is completely free. No download or installation required — it runs right in your browser.