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).