The stadium was designed to easily convert into a basketball or hockey arena. Converting the stadium for basketball and hockey takes 12–18 hours to set up retractable seating and installing the playing surface. In this configuration, typically only the two lower levels at one or both ends are used. The arena configuration seats 20,662 spectators, but is expandable to 39,500 when the upper level is opened. The stadium can also be adapted into a smaller auditorium space (branded as the "Illusions Theater"), with an intimate, enclosed setting, seating upwards of 11,000 using floor space and the north grandstand.

The Alamodome opened with 38 luxury suites and 6,000 club level seats. The original design specifications called for 66 luxury suites. However, since the Spurs were the only full-time tenant at the time, only 38 luxury suites in the north end of the facility were built. The footprints for the 28 unbuilt luxury suites were open floor space just behind the club level seats that surround the south end of the facility. In 2006, the Alamodome underwent an expansion to accommodate 14 new luxury suites. The Sports Club and the Top of the Dome restaurant also received renovations in 2004.

The Alamodome has two permanent Olympic-size ice rinks that can be used for NHL games, figure skating and speed skating. The facility also contains 30,000 square feet (2,800 m2) of meeting rooms and 160,000 square feet (15,000 m2) of continuous exhibit space.

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