4065 Construction Master Pro

Construction Master Pro-Advanced Construction-Math Calculator



The Construction Master Pro sets the industry standard for advanced construction-math calculators.

It provides powerful built-in solutions and expanded preference settings. It’s easy to use in the field or office and perfect for completing plans, layouts, bids and estimates – saves time, money, materials and frustration.

Work smarter, build better and improve your bottom line with the Construction Master Pro!


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 New Features, Functions and Enhanced Solutions: Drywall – Siding and Panels Stairs – Riser Height and solve for Stairwell Opening. Studs On-center, Compound Miter Cuts, Arched Rake-Walls For Contractors, Estimators, Architects, Carpenters, Framers, Draftspersons, Engineers, Builders, Tradespersons.

Dimensional Math and Conversions:

Work in and convert between building dimensional formats: Yards, Feet-Inch-Fractions, Decimal Feet-Inches and Metric – including Area and Volume. D:M:S to Decimal Degree conversions. Find Weight per Volume. Built-in Time Saving Functions. Complete Stair calculations for Risers, Treads, Stringer Length and Incline Angle, Set, Riser Height and solve for Stairwell Opening. Built-in Right-Angle Functions for Square-ups, Slopes and more Area, Volume and Perimeter solutions with Length, Width and Height Keys. Drywall, Siding and Paneling Key calculates 4×8, 4×9 or 4×12. Sheets to cover an Area Roof Function finds Area, Bundles, Squares and 4×8 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). Jack Rafter results for Regular and Irregular Pitch Roof. Find Rake-Wall Studs with On-center spacing Compound Miter – Store Crown Angle and Enter Wall Corner Angle to calculate the Blade Tilt and Angle for Miters cuts. Advanced solutions for Circles, Arches, Columns, Cones, Pillars, Windows and Post-holes Arched Rake-Walls with On-center Spacing Studs – Calculate the number of On-center Studs for an entered Length Equal Sided Polygon – Calculate Corner and Bi-sect Angles, Side Length, Perimeter and Area Block and Footing solutions. Board Feet Lumber estimating.

Additional Features:

User Preferences: Set custom defined options such as Fractional settings for 1/2” to 1/64” and Stair Headroom Height, Decimal Degrees and more Exponential Notation: Enter and display exponential values. Backspace Key: Makes it easy to change just-entered values. Constant Operator: Simplifies repetitive calculations. Cost per Unit: Easily solve unit costing and pricing. Accumulating Memory (M+) – Plus three additional Memory Storage locations. Paperless Tape: Review of last 20 entries; double-check totals. Standard Calculations: works as a regular math calculator with +, -, +/-, x, ÷, %, π, 1/x, X2, and √ Automatic Shut-Off saves battery life. Includes Protective Hard Slide Cover, Easy-to-follow User’s Guide, Handy Pocket Reference Guide in English and Spanish. Long-Life Batteries. Full One-Year Limited Warranty. English and Spanish CD-ROM with “How To” Video and User’s Guide.

Tech Specs:

Size: 5.6” x 3.0” x 0.6” (142.8mm x 76.2mm x 15.9mm). Product Weight: 4.5 oz. (127.5 gm). Includes Case and Pocket Reference Guide. Power: Two 1.5-volt (LR-44/A76) Long-life Batteries. Display Type: 11 Digits (7 normal, 4 Fractions) with Full Annunciators. Display Dimensions: 0.625” x 2.5” (15.88 mm x 63.5 mm). Accuracy: 10 Digit Internal Accuracy

Additional information

Weight 2 lbs
Dimensions 9 × 8 × 2 in