Free · Instant · No download needed

Measure Your Pupillary Distance Online — Free

Get your PD measurement in seconds using your phone camera or webcam. No app, no account, no cost. Just accurate pupillary distance you can use to order glasses online.

AI-powered accuracy
100% private
Works on mobile
Instant results
Measure My PD Now →
±1–2mm
Typical accuracy
10 sec
Average time
100%
Private & local
Free
Always free

How PD Measurement Works

Our AI detects your facial landmarks and calculates the distance between your pupil centres — all in your browser.

1

Take or Upload a Photo

Use your front-facing camera or upload a recent selfie. Face the camera straight-on in good lighting.

2

AI Detects Your Eyes

Our AI model maps 68 facial landmarks and precisely locates the centre of each pupil.

3

Get Your PD Result

Your total PD and monocular left/right measurements are displayed instantly in millimetres.

Why Your PD Measurement Matters

Your pupillary distance (PD) ensures that your prescription lenses are centred precisely in front of your pupils. Without the right PD, even a perfect prescription can cause blurry vision, eye strain, and headaches.

Traditionally, you needed to visit an optician to get this measurement. Now you can get it instantly — and use it to order glasses from any online retailer.

Required by every online glasses retailer
Essential for progressive and bifocal lenses
Needed for reading glasses with a prescription
Can differ slightly between your left and right eye

Average PD by Group

Adult Women57–63mm · avg 61mm
Adult Men60–67mm · avg 64mm
Children (8–12)48–56mm · avg 53mm
All Adults54–74mm · avg 63mm

Frequently Asked Questions

What is pupillary distance (PD)?
Pupillary distance is the measurement in millimetres between the centres of your two pupils. It's used by opticians to position lenses correctly in glasses frames so you see through the optical centre of each lens.
How accurate is this online PD measurement?
Our tool uses AI facial landmark detection to estimate your PD. Results are typically within 1–2mm of a professional measurement, making them suitable for online glasses ordering. For precision prescriptions (high power, progressive lenses), we recommend confirming with an optician.
Is my photo stored or uploaded?
No. All face detection and analysis happens entirely in your browser using local AI models. Your photo never leaves your device and is never uploaded to any server.
What is a normal PD measurement?
The average adult PD is between 60–64mm. Women typically measure 57–63mm and men 60–67mm. A PD outside this range is still completely normal — it just means you have a wider or narrower face.
Do I need my PD to order glasses online?
Yes. Most online glasses retailers require your PD to manufacture prescription lenses correctly. Without it, your lenses won't be centred properly and you may experience distortion or eye strain.

Learn More About PD Measurement

PD Measurement Online

Why online PD tools work and how to get the best results from home.

What is Pupillary Distance?

A complete guide to understanding PD and why it matters for your glasses.

PD Measurement Guide

How PD is measured, what affects it, and what to do with your result.