Contact Real Online Ruler

Questions, bug reports, and ideas are all welcome. The best way to reach us is by email.

What to Include

If the ruler measured incorrectly or something looks wrong, these details help us find the cause:

• Your device model and screen size
• Your browser and its zoom level
• The calibration method you used
• What you expected to see, and what you saw instead

Please don’t send photos of your credit card or any card details. The site doesn’t need them, and neither do we.

Before You Write

Many common questions about accuracy, browser zoom, and phones are answered in the FAQ. For how we handle the information in your message, see our Privacy Policy.