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How to Measure Your Pupillary Distance

Use this step-by-step guide to measure your pupillary distance (PD) by yourself or with the help of a friend.

Getting Started

Printable PD Ruler Download

Print PD ruler

Print PD ruler at 100% size. Do not use ‘scaling’ or ‘fit’ setting. Print setting should be ‘actual size.’

Mirror or Friend

Stand 8 inches (20cm) away from a mirror or a friend. Place & hold the PD ruler against your brow. Keep your face straight.

Ready. Set. Measure!

Take a few measurements for consistency.

Most adults have a PD between 54 – 74 mm. Most children have a PD between 43 – 54 mm.

Printable PD Ruler Download

Your PD

Look straight ahead and read the millimeter line that matches up with the center of your right pupil. This number represent your single PD in millimeters.