The ProjectCalc Plus MX metric do-it-yourself calculator will help you design, apply, install and finish home improvements with precision and confidence. Get accurate linear, area and volume measurements for professional estimating results. It was designed specifically for do-it-yourselfers who use metric measurements. The ProjectCalc® Plus MX has metric-based default values for a wide range of projects. All default values can be changed by the user: Paint: 10 sq. meters per litre Wallpaper: 5.226 meters per roll (based on 520 mm x 10.05 m) Tiles: 100 mm and will calculate number of tiles for an entered area with 8 additional tile sizes ranging from 50 mm to 500 mm Bricks: standard brick size is 0.013975 sq. meters (based on 215 mm x 65 mm); standard paver brick is 0.02 sq. meters (based on 200 mm x 100 mm) 8 x 4 Sheets: Default is 2.9768 sq. meters (based on 2440 mm x 1220 mm); additional sheet sizes are 8 x 2 (2440 x 607 mm), 6 x 2 (1819 mm x 607 mm), and 4 x 2 (1220 mm x 607 mm) Dedicated function keys provide fast conversions for determining quantities of Paint, Wallpaper, Floor Tile, Studs, Flooring, Drywall Sheets, Blocks, Bricks and Gravel. Store "user defined" amounts for certain materials such as Grout Width, Post Spacing, Bags of Concrete and more. Advanced functions provide instant calculation for Decks, Fencing, Mulch, Carpet and Custom Tile. The ProjectCalc Plus MX will also operate as a standard math calculator and has an automatic shut-off. Long-Life LR43 batteries, an easy-to-understand User's Guide, 360° built-in protective hard case and One-Year Limited Warranty are included.