Construction Trade functions: Work in and convert between building dimensions, including Metric, Built-In Right-Angle solutions, Areas, Volumes, Square-Ups, Roof, Rafter and Framing solutions * Built-In-Stair calculations for risers, treads, stringer, length, and incline angle, for easy layout and dimensions with new Riser height with quick solve for stairwell opening * Handles Studs to calculate the number of on-center studs for an entered length also calculates Board Feet Lumber estimating, Block and Footing Solutions, Equal sided polygon"s * Works directly in Yards, Feet, Inches, Fractions and Meters – including square and cubic formats. No need to convert to decimals, D:M:S to Decimal Degree conversions, Drywall, Siding and Paneling calculates 4x8, 4x9 or 4x12 Sheets * Roof function finds area, bundles, squares and 4 by 8 sheathing for flat or pitched roofs, custom rafter function provides common rafters, regular and irregular hips, valleys and jacks; instant cutting angles (cheek, level and plumb)