Scale Ruler

Scale Ruler lets you take exact on-screen measurements, with or without an applied scale factor. Use it as a regular ruler or switch to engineering or architect scales to measure plans, drawings, or on-screen content. When a scale is applied, the tool converts the measurement to the real-world length and displays the actual size.

Name measurements, save them for later, and load them again. Calibration may be required for maximum accuracy and can be done with a traditional ruler or a standard credit card.