Pupillary Distance

Measure your PD at home

Use your webcam and a credit card as a scale reference to estimate pupillary distance in millimeters.

Measure my PD See how it works
Close-up of eyes with a pupillary distance reading of 63.5 mm

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.

Measure my PD