A folding framing square, comprising a substantially right triangular shaped framing square having a flange attached substantially perpendicular thereto and forming a substantially “T” shaped section therewith, a substantially right-angled trapezium shaped framing square hingedly attached to the flange; and optionally having a ring hingedly attached to the flange, the ring adapted to allow a user to removably insert a finger therethrough and facilitate the user to hold the folding framing square. The substantially right-angled trapezium shaped framing square and the ring may each be independently folded from an open to a closed position and vice versa. An alternate embodiment comprises a substantially right triangular shaped framing square having a flange attached substantially perpendicular thereto, a substantially right-angled trapezium shaped framing square hingedly attached to a clamp, the clamp adapted to be removably and releasably attached to the flange.