A multipurpose step stool includes two substantially parallel, congruent, triangular side support members. The triangular side support members each include first, second, and third resting edges adapted to contact a supporting surface such as a floor. The first treads are oriented parallel to the first resting edges, the second treads are oriented parallel to the second resting edges, and the platform is oriented parallel to the third resting edges. The angle between the first and second resting edges, and the positioning of the first and second treads are selected such that, when the first resting edges are placed on a support surface, a first orientation of the step stool is provided with the first and second treads in combination forming a first rise over run ratio; when the second resting edges are placed on a support surface, a second orientation of the step stool is provided with the second and first treads in combination forming a second rise over run ratio; and when the third resting edges are placed on a support surface, a third orientation of the step stool is provided with the platform elevated above the supporting surface.