Calculated Industries 4065-TS Construction Master Pro Advanced Construction Math Calculator Work in and convert between building dimensions, including Metric, Built-In Right-Angle solutions, Areas, Volumes, Square-Ups 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 4 by 8, 4 by 9 or 4 by 12 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)