Calculated Industries 4019 Materials Estimating Calculator Delivers fast linear, area and volume solutions Efficiently displays 11 digits Includes a protective 360 degree hard cover door Works directly in yards, feet, inches, fractions and meters  including square and cubic formats. No need to convert to decimals. Define and store values for materials such as Grout, Fence Post Spacing, Custom Tile, Board Width, Bags of Concrete, Paint Coverage and more Calculate board feet and cost per unit Quick linear, area, and volume answers Dual Power - solar and battery