Calculated Industries 4225 Concrete Calc Pro Calculator The easy-to-use ConcreteCalc Pro helps reduce material waste, improve design accuracy, and cut estimating time. Increase efficiency in the field or in the office with fast, accurate solutions for Square-ups, Loads, Area, Volume, Rebar, Drop, Stairs, and much more. It helps you: Work in Yards, Feet-Inch-Fractions Calculate Area, Volume, and Weight per Volume Automatic Square-ups and Drops Rebar solutions for total Linear Feet and Weight per size Complete Stair Layouts; set Riser Height and Tread Width Equal Sided Polygons Circular Solutions: Circumference, Arc, Cone, Column, and More! For Concrete, Masonry, and Paving Professionals Learn more about this product here: ConcreteCalc Pro Intro and How To Use Dimensional Math and Conversions: Work in and convert between building dimensions: Yards, Feet-Inch-Fractions, and Metric – including Square and Cubic formats. Automatic Weight per Volume; select Pounds, Tons, Kilograms, or Metric Tons. D.M.S. to Decimal Degree Conversions. Dedicated Functions: Length, Width, Height keys for fast Area and Volume solutions Instant Square-up and Drop for perfect layouts Complete Stair calculations: Risers, Treads, Stringers, and Incline Angle Solve “not-to-exceed” Riser Height, (Store “Riser Height” and “Tread Width”) Rebar: find total Linear Feet and calculate Weight for Rebar Sizes; store various Rebar Size, On-center Spacing Number of Loads: calculate the number of truck Loads based on Load size Bags: easily determine the number of bags of concrete for small jobs Circular solutions for Area, Arc, Circumference, Column, and Cones Automatic Block and Footing keys for material estimates Polygon: calculate Full angles and Bi-sect angles Added Features/User Preferences: Set custom options; Fractions, Volumes, Stairwell Opening Cost per Unit: quickly solve unit cost and total pricing Backspace Key: easily correct entry errors "Paperless" Tape: enables review of last 20 entries; double-check totals Works as a standard math calculator with %, +, -, x, ÷, +/-, Π, 1/x, x2, and √. Includes Protective 360° Hard Cover Case, Handy Pocket Reference Guides in English/Spanish, Long-Life Batteries, Full One-Year Limited Warranty. Tech Specs: Size: 5.7” x 3.0” x 0.65” (145 mm x 76 mm x 17 mm) Weight: 4.15 oz. (117.7 gm) Includes Case and Field Reference Guide Power: One 3-volt (CR-2016) Long-life Battery Display Type: LCD: 11 Digits* (7 normal, 4 Fractions) with Full Annunciators Display Dimensions: 0.73” x 2.56” (19 mm x 6.5 mm) Accuracy: 12 Digit Internal Accuracy *Maximum Display: up to 19999999.99