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Pupillary distance (PD) online ruler
Measure the distance between your pupils from a photo with a bank card as the scale, for ordering glasses.
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About Pupillary distance (PD) online ruler
Measure the distance between your pupils for glasses, using a photo and a standard bank card as the scale reference. Adult PD is typically 54 to 74 mm. Opticians need it so lenses are centred in front of your eyes. Hold the card flat against your forehead for the best result.
How to use Pupillary distance (PD) online ruler
- Enter your numbers above.
- The result updates instantly as you type.
- Change any value to compare different cases.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Available in 10 languages.
Also known as
Frequently asked questions
What is a normal pupillary distance?
Most adults fall between 54 and 74 mm, averaging about 63 mm. Measure carefully, since a few millimeters can matter for strong lenses.
Is Pupillary distance (PD) online ruler free?
Yes. Pupillary distance (PD) online ruler on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.