Structural Engineer Costs. Homeowners spend an average of $512 on hiring a structural engineer, with most homeowners spending between $319 and $708. The larger and more detailed the project is, the higher the cost of hiring a structural engineer becomes. Some professionals charge by the job, while others may charge by the hour.
The total surface area of Earth is about 197 million square miles (509 million square km). About 71 percent is covered by water and 29 percent by land.
Countries of the World: 196 (with the addition of South Sudan in 2011 as the world's newest country). Earth's Circumference at the Equator: 24,901.55 miles (40,075.16 km). Earth's Circumference Between the North and South Poles: 24,859.82 miles (40,008 km). Earth's Diameter at the Equator: 7,926.28 miles (12,756.1 km). Earth's Diameter at the Poles: 7,899.80 miles (12,713.5 km). Average Distance from the Earth to the Sun: 93,020,000 miles (149,669,180 km).