An equipment for adjusting the distance of a furniture unit relative to a supporting surface, comprising: at least one supporting foot in turn comprising: a fixed rod extending between a relative lower end positioned, in use, in contact with the supporting surface, and a relative upper end connected, in use, to the furniture unit; a rule rotating with respect to the rod about a main axis of extension of the rod operatively connected to a system for varying the height of the foot relative to the supporting surface in such a way that rotating the rule varies the height of the supporting foot, at least one adjusting tool comprising: a rotating bar extending between a relative operating end and a relative movement end; first drive means associated with the operating end of the bar and configured to be moved by rotating the bar on itself; second drive means positioned at the rotating rule of a support foot and configured to make the latter rotate; the first and second drive means being configurable between an operating condition in which they are in mutual contact for the mechanical transmission of the movement of the bar towards the rule, and a second non-operating condition in which the first drive means are detached relative to the second drive means; means (20, 21 and 22) for holding the operating end of the bar in position relative to the rule during the operating condition; characterised in that the holding means (20, 21 and 22) comprise at least a fork offset relative to the first drive means along the main axis of extension of the rod and having a seat at least partly shaped to match the rod to embrace the latter during the operating condition in such a way as to exert a hold against the lateral movements of the equipment relative to the rod without influencing the rotation of the rule. at least one supporting foot in turn comprising: a fixed rod extending between a relative lower end positioned, in use, in contact with the supporting surface, and a relative upper end connected, in use, to the furniture unit; a rule rotating with respect to the rod about a main axis of extension of the rod operatively connected to a system for varying the height of the foot relative to the supporting surface in such a way that rotating the rule varies the height of the supporting foot, a fixed rod extending between a relative lower end positioned, in use, in contact with the supporting surface, and a relative upper end connected, in use, to the furniture unit; a rule rotating with respect to the rod about a main axis of extension of the rod operatively connected to a system for varying the height of the foot relative to the supporting surface in such a way that rotating the rule varies the height of the supporting foot, at least one adjusting tool comprising: a rotating bar extending between a relative operating end and a relative movement end; first drive means associated with the operating end of the bar and configured to be moved by rotating the bar on itself; second drive means positioned at the rotating rule of a support foot and configured to make the latter rotate; the first and second drive means being configurable between an operating condition in which they are in mutual contact for the mechanical transmission of the movement of the bar towards the rule, and a second non-operating condition in which the first drive means are detached relative to the second drive means; means (20, 21 and 22) for holding the operating end of the bar in position relative to the rule during the operating condition; a rotating bar extending between a relative operating end and a relative movement end; first drive means associated with the operating end of the bar and configured to be moved by rotating the bar on itself; second drive means positioned at the rotating rule of a support foot and configured to make the latter rotate; the first and second drive means being configurable between an operating condition in which they are in mutual contact for the mechanical transmission of the movement of the bar towards the rule, and a second non-operating condition in which the first drive means are detached relative to the second drive means; means (20, 21 and 22) for holding the operating end of the bar in position relative to the rule during the operating condition;