The Earth's total surface area is about 510 million square kilometers (about 197 million square miles). About 71% of this surface is covered by water, while the remaining ~29% is land. Details:
- Total surface area: ~510,072,000 km² (about 197,000,000 mi²) [web results indicate this widely cited figure].
- Water vs. land split: roughly 71% water, 29% land, meaning water area around 361 million km² and land area around 149 million km².
- Shape note: Earth is an oblate spheroid, slightly flattened at the poles, which affects precise measurements but not the overall totals.
