This interactive ruler allows you to freely reposition the scale over any image or object on your display. Drag using touch or mouse, rotate 90°, and toggle between cm, mm, and inches.
Calibrate using a standard card or screen diagonal to guarantee exact 1:1 physical scaling.
Drag the ruler anywhere on your screen for quick alignment.
Switch between 30 cm horizontal and 18 cm vertical scale.
Seamlessly toggle between centimeters, millimeters, and inches.
