Convert Square Nautical Miles to Square Furlongs
Convert Square Nautical Miles (nmi²) to Square Furlongs (fur²) instantly and accurately.
Conversion Formula
fur² = nmi² × 84.75477363
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 Furlongs
A square furlong is an area unit equal to a square with sides of one furlong (220 yards or ~201.17 m), approximately 40,469 m² or exactly 10 acres. The furlong (from Old English 'furrow-long') was historically the standard ploughing distance, and 10 square furlongs equals one acre - a relationship that made traditional land surveying convenient. While square furlongs are rarely used in official modern measurements, they appear in historical land surveys, British horse racing contexts, and as a handy reference for visualising 10-acre blocks.
Quick Reference Table
| Square Nautical Miles (nmi²) | Square Furlongs (fur²) |
|---|---|
| 1 nmi² | 84.7548 fur² |
| 2 nmi² | 169.51 fur² |
| 5 nmi² | 423.774 fur² |
| 10 nmi² | 847.548 fur² |
| 25 nmi² | 2118.87 fur² |
| 50 nmi² | 4237.74 fur² |
| 100 nmi² | 8475.48 fur² |