An adjustable chair with adjustable features to relieve the pressure on occupant's spine, tailbone, and pelvic bone when in sitting position. The adjustable chair includes a seat assembly and an adjustable support frame underlying the seat assembly with a plurality of legs and support casters. The seat assembly includes a backrest and a seat articulated together adjacent the lower edge of the backrest and rear edge of the seat. The automatic adjustable chair includes plurality of electrically motorized drive system to automate the various adjustable features. These drive systems are controlled by a single controller unit operable by the occupant from the sitting position.