Mechanical and Electrical (Digital) Planimeters are excellent area measuring tools to use when you measure irregular shaped areas on plans or drawings. They eliminate the need for grids, charts, or calculations done by hand. If you need to measure the area of an object in 2D we recommend a planimeter. Planimeters are used by professionals in these areas: Surveying, Civil Engineering, Cartography, Architecture, Medicine, Clothing, Industry, Boat & Ship Design, Office, Store & Plant Planning, Biology, and more.