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
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.
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.