INCHMATE PLUS CALCULATOR - Instantly converts between feet/inches/fractions, decimal feet, and meters at the touch of a button. Patented, user-friendly entry system with dedicated fraction keys. Includes triangle calculation keys, long-lasting lithium battery with auto-off, tough, protective case with write-on strip, and one-year manufacturer limited warranty. An indispensable tool for Cabinetmakers, Construction Trade, Do-it Yourselfers, Graphic Designers, Interior Designers, Space Planners, Architects, Builders, CAD Users, Carpenters, Contractors, Designers, Draftsmen, Engineers, Estimators, Homemakers, Students, & You! Shipping weight .5 lbs