Quickly estimates requirements for paint, wallpaper, tiles, flooring, bricks, blocks, 8x4 sheets, slabs, studs and bulk bags. Hinged lid with pocket for quick reference guide. Can be used to work in or convert between metres-mm-cm or yards-feet-inches and fractions, including area and volume. Can also be used as a normal calculator. Specifications: W x D x H: 75 x 14 x 121mm. LR43 battery supplied.