Floor panel for forming a floor covering, wherein this floor panel is rectangular and oblong and thus comprises a first pair of opposite edges, which form the long edges of the floor panel, as well as comprises a second pair of opposite edges, which form the short edges of the floor panel; wherein both pairs of opposite edges (2-3, 4-5) comprise coupling parts (6-7, 8-9), which allow that a plurality of such floor panels mutually can be coupled to each other; wherein these coupling parts (6-7, 8-9), on both pairs of edges (2-3, 4-5), form a first locking system, which, in a coupled condition of two of such floor panels, effects a locking in the plane of the floor panels and perpendicular to the respective edges, as well as form a second locking system, which, in a coupled condition of two of such floor panels, effects a locking transverse to the plane of the floor panels; wherein these coupling parts on the first pair of opposite edges substantially are realized in the material of the floor panel itself; wherein the coupling parts of at least the first pair of opposite edges are configured such that two of such floor panels can be coupled to each other at these edges by means of a turning movement and to this aim these coupling parts on the first pair of opposite edges consist of a tongue and a groove, as well as of locking parts, which, in the coupled condition, prevent the shifting apart of the tongue and groove; wherein on the first pair of opposite edges the groove is bordered by a lower lip and an upper lip, of which the lower lip extends laterally up to beyond the distal extremity of the upper lip; wherein the coupling parts on the second pair of edges are configured such that two of such floor panels can be coupled to each other at these edges by means of a downward movement of one floor panel in respect to the other, more particularly such that a plurality of such floor panels can be coupled to each other by means of the so-called "fold-down" technique; wherein the first locking system of the second pair of edges is at least formed of an upward-directed lower hook-shaped part, which is situated on one of said two edges and which comprises a distal extremity, as well as a downward-directed upper hook-shaped part, which is situated on the opposite edge, wherein the lower hook-shaped part consists of a lip with an upward-directed locking element, whereas the upper hook-shaped part consists of a lip with a downward-directed locking element; wherein the second locking system of the second pair of edges is at least formed by a locking part, which is situated on the distal extremity of the lower hook-shaped part, as well as a locking part, which cooperates therewith in the coupled condition of two of such floor panels, on the edge which comprises the upper hook-shaped part; wherein the distal extremity of the upper hook-shaped part and the side which, in coupled condition, is opposite thereto, are free from mutually vertically locking portions, or said distal extremity and said side have mutually vertically locking portions (31, 32); characterized in that the coupling parts on the first pair of edges are configured such that during the turning into each other of two of such floor panels an elastic force has to be overcome during the turning movement, which force, during the turning into each other, first increases in order to subsequently decrease again; that the floor panels on the first pair of edges, in the final coupled condition of two of such floor panels, are coupled in horizontal direction free from play, or, if such play indeed exists, this play is less than 0.2 mm; that the aforementioned locking parts of the first locking system on the first pair of edges are formed at least of a locking part on the lower side of the tongue and a locking part on the aforementioned lower lip, which, by means of contact surfaces, which can cooperate with each other, result in the respective locking; and that the coupling parts on the first pair of edges in the coupled condition show one or both of the following characteristics: - in the direction of the distal extremity of the tongue, at the same height as the aforementioned contact surfaces, a free space is present between the tongue and the opposite floor panel; - the cooperation of the aforementioned contact surfaces defines a tangent line which, in respect to the horizontal, forms an angle of at least 40 degrees. - in the direction of the distal extremity of the tongue, at the same height as the aforementioned contact surfaces, a free space is present between the tongue and the opposite floor panel; - the cooperation of the aforementioned contact surfaces defines a tangent line which, in respect to the horizontal, forms an angle of at least 40 degrees.