Online Inch Ruler

To use an online ruler, open OnlineRuler, choose cm, mm, inches, or pixels, and place your object against a screen edge. Read the live marker as you move across the scale, then calibrate the display when you need an actual-size result.

Yes. OnlineRuler is a free online ruler that works in a browser on desktops, laptops, tablets, Android devices, and phones. This ruler online needs no download, registration, or account.

Yes, you can use your phone as a ruler by opening OnlineRuler in a mobile browser. It works as a ruler for phone or iPhone measurements; place the object beside the scale and calibrate for better accuracy.

Select cm in the ruler controls, align the object with the top, bottom, left, or right edge, and follow the centimetre markings. Calibrate the screen first if an online ruler cm measurement must match the physical size.

Switch the tool to inches and use the numbered marks: the distance between consecutive whole-number marks is one inch. For an accurate online ruler inches measurement, calibrate your display before measuring a physical object.

Choose the unit you need, then read the numbered major marks and the smaller divisions between them. This online ruler shows inches, millimetres, centimetres, or pixels, including an online ruler inches vertical scale when the side edge is selected.

Yes, you can measure online using a screen ruler for layouts, crafts, schoolwork, and everyday objects. It is an accurate online ruler after calibration, while uncalibrated measurements are estimates based on your display.

A smartphone can measure small objects with a ruler for phone screen, but screen size and pixel density affect the result. Use an Android ruler or ruler for iPhone in the browser, then calibrate it for a more accurate measurement.

This online ruler uses the visible screen scale rather than the camera, so no camera access is needed. For a reliable result, place the object beside the ruler and calibrate the screen instead of estimating size from a photo.

In Word Online, open the View tab and turn on Ruler when the option is available in your version. For a quick on-screen measurement outside the document, use this free online ruler and choose cm, mm, or inches.

Open the View tab in PowerPoint Online and enable Ruler if it is available in the web editor. When you need to check a physical size or screen distance, use the calibrated online ruler alongside your presentation.