PupillaryDistanceApp.com
Measure your PD at home
Use your webcam and a credit card as a scale reference to estimate pupillary distance in millimeters.
Built for clarity when vision isn’t perfect
High-contrast clinical colors, large controls, and cyan camera guides stay visible over skin tones and cards—so you can align without guessing.
Three steps
Allow camera access
Everything runs in your browser. Your face video is not uploaded.
Hold a credit card
Place a standard card across your mouth for a known 85.6 mm width scale.
Capture your PD
We detect your pupils and auto-box the card, then convert pixels to millimeters.