Calculated Industries 4325 HeavyCalc Pro Construction Calculator Work in and convert between Yard, Feet-Inch-Fraction and Metric formats! Automatically calculate Areas and Volumes! Square-ups and Right Angles; Percent Grade and Slope; stakeout Drops, Ramps, Trenches, much more Weight per Volume (Lbs, Tons, Kg)! Easily find Swell and Shrink