Metric Diy Calculator, Model 8528, From Calculated Industries. From the Manufacturer The ProjectCalc Plus MX was designed specifically for Do-It-Yourselfers in the United Kingdom and other countries that use Metric measurements. It helps you quickly figure project material quantities, linear distances, areas/volumes and material costs for Paint, Concrete Gravel, Studs, Drywall, Tile, Wallpaper, Flooring, Slabs (Patio). Work in Centimetres and Metres including square and cubic formats. BTU function can convert BTU value to Kilowatt Hours for electric radiators and gas fires. Also calculates BTUs required to heat an entered volume. The ProjectCalc Plus MX has metric-based default values for a wide range of projects. All default values can be changed by the user. Square-ups--Easily solves right triangle problems. Finds the diagonal, so you can "square up" to make sure an area is perfectly square (e.g., for pouring concrete pads).