A wrench selector system for efficiently selecting a wrench based on the head size of a fastener or nut. The wrench selector system generally includes: a housing including a display unit; first and second prongs protruding from said housing, wherein first and second grippings are adjoined to said first and second prongs, respectively; and a control button positioned on said first gripping to allow for holding and computing of at least one of a head size of a fastener or nut; wherein said computing is displayed on said display unit.