Convert Square Rods to Square Nautical Miles
Convert Square Rods (sq rd) to Square Nautical Miles (nmi²) instantly and accurately.
Conversion Formula
nmi² = sq rd × 7.374215908e-6
About Square Rods
A square rod (sq rd), also called a perch or square pole, equals the area of a square with sides of one rod (5.0292 m or 16.5 ft), giving approximately 25.29 m². This traditional unit was central to land surveying before the adoption of the metric system and remains embedded in legal property descriptions in the United States. There are exactly 160 square rods in one acre, and 40 square rods in one rood. Old farmland deeds and archaic land records in the UK and US frequently reference perches and square rods.
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 Rods (sq rd) | Square Nautical Miles (nmi²) |
|---|---|
| 1 sq rd | 7.374 × 10-6 nmi² |
| 2 sq rd | 1.475 × 10-5 nmi² |
| 5 sq rd | 3.687 × 10-5 nmi² |
| 10 sq rd | 7.374 × 10-5 nmi² |
| 25 sq rd | 0.000184355 nmi² |
| 50 sq rd | 0.000368711 nmi² |
| 100 sq rd | 0.000737422 nmi² |