QSOnscreen is a freeware utility for measuring areas and lengths from screen images. Accuracy is comparable with many expensive digitizers and better than old-style planimeters. Whether you're measuring paving or landscaping areas off drawing images or engaged in scientific planimetry analysis, you will find QSOnscreen to be a useful easy-to-use tool. If you use Calculix QS measurement software, you also have the benefit of importing room data directly into it from QSOnscreen's Calculix Mode. In Cut and Fill Mode you can enter existing and finished levels onto your outlined areas then calculate earthworks and disposal volumes at the press of a button.