Features a broad range of nearly automatic construction-math problem solutions. Single key solutions to arc length, circumference, circle area, board feet conversions, and weight-per-volume conversions, this calculator works directly in most any common construction or building dimensional format. Adds, subtracts, multiplies and divides in feetinch-fractions, decimal feet (10ths, 100ths), inches, fractions, decimal inches, yards, meters, centimeters, millimeters, square and cubic dimensions. Converts to and from any dimensional format. Automatically finds lengths of rafters, regular (45°) and irregular (non-45°) hips, valleys and jacks, stair stringers, angle of incline, number of risers and treads for any landing-to-landing height, plus riser height and tread width. Features paperless tape for reviewing past 20 entries. Includes easy-to-follow pocket reference guide and how-to CD, in English and Spanish, long-life batteries and a full one-year limited warranty.