←
📏 Online Screen Ruler
📏

Online Screen Ruler

Add to favorites

A real-size ruler on your screen in centimeters and inches. Calibrate once with a credit card or your screen's diagonal size, then measure anything held against the display.

Online Screen Ruler 📦 4.6 KB

Calibration

Or hold a credit card against the screen and drag the slider until the card outline matches its width (85.6 mm).

Tip: measure by holding the object against the screen. On touch screens, drag the ruler to move it.

Calibration is saved in your browser for this device.

Credit card outline · 85.6 × 53.98 mm