Convert Square Nautical Miles to Square Kilometers
Convert Square Nautical Miles (nmi²) to Square Kilometers (km²) instantly and accurately.
Conversion Formula
km² = nmi² × 3.429904
About Square Nautical Miles
A square nautical mile (nmi²) equals the area of a square with sides of one nautical mile (1,852 m), giving approximately 3,429,904 m² - about 343 hectares. This unit is used in maritime and aviation contexts to describe patrol zones, territorial extents, and maritime boundaries. Exclusive Economic Zones (EEZs) and military operating areas are often quoted in square nautical miles. One square nautical mile is approximately 1.32 square statute miles.
About Square Kilometers
A square kilometer (km²) is a metric unit of area equal to a square with sides of one kilometer (1,000 m × 1,000 m). It is used for measuring large land areas such as cities, forests, lakes, and countries. Manhattan (New York) is about 59 km², and Monaco (the second smallest country) is just over 2 km². This unit is essential in geography, urban planning, forestry, and environmental impact studies.
Quick Reference Table
| Square Nautical Miles (nmi²) | Square Kilometers (km²) |
|---|---|
| 1 nmi² | 3.4299 km² |
| 2 nmi² | 6.85981 km² |
| 5 nmi² | 17.1495 km² |
| 10 nmi² | 34.299 km² |
| 25 nmi² | 85.7476 km² |
| 50 nmi² | 171.495 km² |
| 100 nmi² | 342.99 km² |