archCalc is a mixed unit decimal and fraction calculator. It allows oneto enter dimensions in standard english and metric units of measurement,perform basic calculations, convert between units, keep track of aseries of operations, and take notes on results. archCalc works as a standalone calculator or in conjunction with otherprograms, calculating stair risers in CAD software, or aiding intakeoffs with a spreadsheet. archCalc floats above applicationsallowing one to work with it as if it were a part of the activeapplication.