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Accurately measure your pupillary distance in seconds using advanced AI technology. No app download required. Works on any device.
Get optician-grade PD measurements for your glasses prescription
Most prescriptions use Distance PD. Near PD is typically 2-3mm smaller due to eye convergence.
Place a standard credit card on your forehead. This provides a reference scale for accurate measurement.
Use good lighting and take a clear photo facing the camera with the credit card visible.
Our AI analyzes the photo to detect your pupils and calculate your PD with high accuracy.
Pupillary distance (PD) is the distance between the centers of your pupils, measured in millimeters. This measurement is essential for properly aligning your glasses lenses with your eyes for optimal vision correction.
Standard ID-1 credit cards are exactly 85.60mm x 53.98mm worldwide. By including your credit card in the photo, our AI can calculate precise image scale and improve measurement accuracy.
Absolutely not. All image processing happens locally in your browser. Your photos are never uploaded to any server. Your privacy is our top priority. See our Privacy Policy for details.
Our tool uses advanced MediaPipe Face Mesh technology with 478 facial landmark points. When used correctly with proper lighting and a visible credit card reference, accuracy is within 1-2mm of professional measurements. However, we recommend verifying with your optician for prescription glasses.
The average adult PD ranges between 54-74mm, with most adults falling between 60-68mm. Children typically have smaller PD measurements. Your specific PD depends on your facial structure and is unique to you.