Website overview
About Online Ruler
Online Ruler is a free measuring tool that runs in a web browser without an account. It offers on-screen rulers in centimeters, millimeters and inches, guides along both axes, image measurement and a protractor for checking angles. Before measuring a physical object against the screen, calibrate the ruler using a reference of known size so that its units match your display. You can adjust the view and use the measuring tools for small objects, drawings and image-based checks. It is useful for students, designers and makers who need a convenient visual reference without installing software.
At a glance
Key features
- Calibrate the ruler to match your display
- Measure using centimeters, millimeters or inches
- Inspect images at actual size for measurement
- Use a protractor to measure angles
Practical details
What can you use this website for?
Calibrate the ruler to your display, place a small object against the screen and read its approximate length in centimeters or inches.
Who is it for?
Students, designers, makers and anyone who needs to measure small objects or inspect an image using an on-screen ruler.
What to know
What makes it different?
Pairs display calibration with physical units, image measurement and a protractor in one browser-based measuring tool.
About this listing
Information about features, pricing and suitability is supplied by the submitter, not independently verified by Zearches. Websites are screened against submission and safety rules, but inclusion is not an endorsement.
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