Johnson's supply calculator provides accurate material quantities and costs for jobsite calculations, including trade specific pre-programmed functions. Solve all your dimensional math quickly and easily using the dedicated key functions for concrete, block, gravel, deck, fence, studs, flooring, and paint. Use it in the field or office to save time and prevent costly material waste. Its oversized LCD is easy to read and converts measurements in both English and Metric and the paperless tape mode is useful for checking figures while scrolling through the past twenty entries. Comes with durable protective case, user manual and handy reference guide.