Convert Roods to Square Nautical Miles
Convert Roods (ro) to Square Nautical Miles (nmi²) instantly and accurately.
Conversion Formula
nmi² = ro × 0.0002949686363
About Roods
A rood (ro) is a traditional English unit of land area equal to one quarter of an acre, or 40 square rods, approximately 1,011.71 m². Originating in medieval England, the rood was used alongside the acre and the perch for describing land ownership. The name shares its root with 'rod,' the linear unit used to measure it. While largely obsolete in modern use, roods still appear in old English legal documents, historical land surveys, and certain rural property records in England and Wales.
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
| Roods (ro) | Square Nautical Miles (nmi²) |
|---|---|
| 1 ro | 0.000294969 nmi² |
| 2 ro | 0.000589937 nmi² |
| 5 ro | 0.00147484 nmi² |
| 10 ro | 0.00294969 nmi² |
| 25 ro | 0.00737422 nmi² |
| 50 ro | 0.0147484 nmi² |
| 100 ro | 0.0294969 nmi² |