Online Ruler
Display a real-size ruler in your browser to measure objects. Screen calibration ensures accuracy on any monitor.
How to Use
Calibrate Screen
Calibrate the screen scale using a reference object like a credit card
Place Object on Screen
Place the object you want to measure against the ruler on the screen
Read Measurement
Read the length in cm or inches from the ruler markings
Features
cm/inch Toggle
Easily toggle between centimeters and inches for measurement
Screen Calibration
Accurate display on any monitor with reference object calibration
Mobile Friendly
Works on smartphones and tablets too
FAQ
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