The lake covers 315 km2 (122 sq mi), of which 240 km2 (93 sq mi) is on the Austrian side and 75 km2 (29 sq mi) on the Hungarian side.[3] The lake's drainage basin has an area of about 1,120 km2 (430 sq mi). From north to south, the lake is about 36 km (22 mi) long, and it is between 6 km (3+1⁄2 mi) and 12 km (7+1⁄2 mi) wide from east to west. On average, the lake's surface is 115.45 m (378.8 ft) above the Adriatic Sea and the lake is no more than 1.8 m (5 ft 11 in) deep.