New: Auto-Detection Mode

Measure Your PD in Seconds

The easiest way to measure your Pupillary Distance (PD) for buying glasses online. Fast, free, and accurate using just your webcam or phone.

Steps for measurement

Step 1 of 4: Capture Photo

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Instructions

  • • Hold the credit card directly under your nose, parallel to your eyes
  • • The credit card should be at the same distance from the camera as your face
  • • Look straight at the camera, keeping your head level
  • • Ensure even lighting with no glare
  • • Remove glasses if wearing

❌ Don't:

  • • Hold the reference object at an angle
  • • Place it too far from your face
  • • Cover part of your face with the object
  • • Take photo from the side
  • • Use in poor lighting conditions

✅ Do:

  • • Keep the reference object perfectly horizontal
  • • Align it with your eye level
  • • Ensure your face is clearly visible
  • • Take photo straight-on
  • • Use good, even lighting

How It Works

Get your accurate measurement in 3 simple steps

1. Capture

Take a photo using your webcam or upload one. Hold a standard card under your nose for scale.

2. Auto-Detect

Our AI automatically finds your pupils. You just need to mark the corners of the card.

3. Get Result

Instantly see your PD in millimeters. Use this number to order your perfect glasses.

Frequently Asked Questions

What is Pupillary Distance (PD)?
Pupillary Distance (PD) is the distance in millimeters between the centers of your pupils. It is essential for accurately positioning lenses in your glasses so that you look through the optical center of the lens.
How do I measure PD online with this app?
You have two options:
  • Auto Mode: Use your webcam. The app detects your pupils automatically, and you simply mark the reference object.
  • Manual Mode: Upload a photo held with a reference object (like a credit card) under your nose, then manually mark your pupils and the card.
What objects can I use as a reference?
You can use standard objects with known sizes:
  • Credit/Debit Card (Standard 85.60mm width)
  • Dollar Bill
  • 6-inch Ruler
  • A4 Paper
Is it free to use?
Yes, this tool is 100% free with no hidden costs or app downloads required.
Can I use this for ordering prescription glasses?
Absolutely. The PD value measured here is accurate and suitable for ordering glasses from any online retailer.