The Construction Master Pro Desktop is easy to use on the jobsite or in the office and is perfect for completing layouts, bids and estimates. It is the most complete construction-math calculator on the market. It will help you save time, reduce costs and prevent re-work. Work in and convert between metric and feet-inch-fractions. Instantly calculate complex construction challenges for stair layouts, roofs, framing and much more. Full trigonometric functions with sine, cosine, tangent, arcsine, arccosine and arctangent.

• Full trigonometric functions simplify complex design and construction math: sine, cosine, tangent, arcsine, arccosine and arctangent
• Easy to use calculator has large keys and a multi-position, adjustable display
• Work in the construction units you use: feet-inch-fractions, yards, meters, centimeters or millimeters
• Advanced circular calculations for arcs, circumference, segments
• Studs: find number on-center for an entered length
• Complete stair calculations for risers, treads, stringer length, incline angle and stairwell opening
• Easy area, volume and perimeter solutions with length, width and height keys
• Drywall, siding and paneling function calculates 4x8, 4x9 or 4x12 sheets to cover an area
• Roof function finds area, bundles, squares and 4x8 sheathing for flat or pitched roofs
• Rafter function solves for common rafters, regular and irregular hips, valleys and jacks
• Quickly find cheek, level and plumb cutting angles
• Calculate on-center spacing for rake-wall studs
• Find the angles for compound miter cuts needed for crown molding
• Advanced solutions for circles, arches, columns, cones, pillars, arched windows
• Equal-sided polygons - calculate corner and bi-sect angles, side length, perimeter and area
• Block and footing solutions
• D:M:S to decimal degree conversions
• Includes easy-to-follow user guide, long-life battery, 1-year warranty