NRG Stadium (formerly Reliant Stadium) is a multi-purpose stadium, in Houston, Texas, USA. NRG Stadium has a seating capacity of 71,054, a total area of 1,900,000 square feet (180,000 m²) with a 97,000 sq ft (9,000 m²) playing surface. NRG Stadium employs two different playing surfaces; a natural grass field is used for professional football games while an artificial surface, AstroTurf GameDay Grass, is used for college and high school games.