A portable lift chair has a lightweight frame with a pair of cross members extending from opposing sides thereof from front to back in a substantially X-shaped configuration, with the cross members pivotally secured to one another and to the front portion of the frame by a pivoting linkage, a seat base, a pivotable bracket connecting the front portion of the seat base to the frame, a weight adjustable pressurized cylinder providing an upward bias to the rear portion of the seat base, a removable back rest, and a guide track with an actuator for moving the weight adjustment bracket from one anchor point to another as desired to achieve a predetermined pressure for the seat.