The Construction Master Pro is an award-winning advanced feet-inch-fraction construction-math calculator with powerful built-in solutions perfect for completing layouts, plans, bids and estimates. Calculate circles, roofs, stairs, and more. Works in and converts between feet-inches-fractions and decimals, including metric. Use it in the field or office to save time, reduce costs, prevent re-work and maximize profits. Work in and convert between building dimensions, including metric. Built-in right-angle solutions. Areas, volumes, square-ups. Complete stair layouts, roof, rafter and framing solutions. Circle, arcs, circumference, segments. Drywall, siding and panels. Stairs, riser height and solve for stairwell opening. Studs on-center, compound miter cuts, arched rake-walls. Work in and convert between building dimensions, including Metric.