The choice of professional builders and contractors worldwide! The Construction MasterĀ® Pro feet-inch-fraction calculator features a broad range of nearly automatic construction math problem solutions. From its single key solutions to arc length, circumference, circle area, board feet conversions and weight-per-volume conversions, this popular calculator works directly in most any common construction or building dimensional format. It adds, subtracts, multiplies and divides right in feet-inch-fractions, decimal feet (10ths, 100ths), inches, fractions, decimal inches, yards, meters, centimeters, millimeters...even square and cubic dimensions. Plus, it converts to and from any dimensional format. The Construction Master Pro features new advanced dedicated key functions for blocks, roof areas and footings. Plus it has enhanced stair, rafter, rake wall and circular cone functions. It has a rugged slip on hard case with a convenient pocket on the back to hold the field Users Guide.