Screen Calipers are a unique on-screen measurement tool, similar to a screen ruler. They resemble real life vernier calipers in both form and function. They can be used with any program where fast and accurate measurements are required. Originally created for graphics and web professionals for onscreen html layout, the Screen Calipers are currently being used by thousands of people for hundreds of uses. These include engineers with CAD drawings, Architects with blueprints, Designers with illustrations, even an Orthodontist who uses the Screen Calipers to measure teeth on X-Rays.