Earth Measurements Converter
About Earth Measurements
Earth's Key Dimensions:
- Equatorial Radius: 6,378.137 km (3,963.191 mi)
- Polar Radius: 6,356.752 km (3,949.903 mi)
- Mean Radius: 6,371.0 km (3,958.8 mi)
- Equatorial Circumference: 40,075.017 km (24,901.461 mi)
- Meridional Circumference: 40,007.863 km (24,859.734 mi)
- Surface Area: 510,072,000 km² (196,940,000 sq mi)
- Land Area: 148,940,000 km² (57,510,000 sq mi)
- Water Area: 361,132,000 km² (139,434,000 sq mi)
Coordinate Systems:
Geographic coordinates use latitude and longitude to specify locations on Earth:
- Latitude: Ranges from -90° (South Pole) to 90° (North Pole)
- Longitude: Ranges from -180° to 180°, with 0° at the Prime Meridian (Greenwich)
- DMS (Degrees, Minutes, Seconds): e.g., 40° 26′ 46″ N, 79° 58′ 56″ W
- Decimal Degrees: e.g., 40.446° N, 79.982° W
Common Earth Measurement Conversions:
- 1 nautical mile = 1.852 km = 1.15078 miles
- 1 degree of latitude = approximately 111 km (69 miles)
- 1 degree of longitude at the equator = approximately 111 km (69 miles)
- 1 degree of longitude at 45° latitude = approximately 79 km (49 miles)
- 1 acre = 4,046.86 square meters = 0.404686 hectares
- 1 hectare = 10,000 square meters = 2.47105 acres
