Convert Square Furlongs to Square Nautical Miles
Convert Square Furlongs (fur²) to Square Nautical Miles (nmi²) instantly and accurately.
Conversion Formula
nmi² = fur² × 0.01179874545
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.
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.
Quick Reference Table
| Square Furlongs (fur²) | Square Nautical Miles (nmi²) |
|---|---|
| 1 fur² | 0.0117987 nmi² |
| 2 fur² | 0.0235975 nmi² |
| 5 fur² | 0.0589937 nmi² |
| 10 fur² | 0.117987 nmi² |
| 25 fur² | 0.294969 nmi² |
| 50 fur² | 0.589937 nmi² |
| 100 fur² | 1.17987 nmi² |