Earth diameter = 12,750 km
Earth radius = 6,375 km
Sphere Surface Area = 4 • π • r²
Sphere Surface Area = 4 * 3.14159 * 6375^2
Sphere Surface Area = 4 * 3.14159 *
40,640,625
Earth's Entire Surface Area = 510,704,724 square kilometers
Surface NOT covered by water = 510,704,724 * .3
Surface NOT covered by water =
153,211,417 square kilometers
