Input acres ares circular inches hectares hides roods square centimeters square feet (UK & US) square feet (US survey) square inches square kilometers square meters square miles square millimeters squares (of timber) square rods (or poles) square yards townships Output acres ares circular inches hectares hides roods square centimeters square feet (UK & US) square feet (US survey) square inches square kilometers square meters square miles square millimeters squares (of timber) square rods (or poles) square yards townships