Convert Square Nautical Miles to Roods
Convert Square Nautical Miles (nmi²) to Roods (ro) instantly and accurately.
Conversion Formula
ro = nmi² × 3390.190945
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 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.
Quick Reference Table
| Square Nautical Miles (nmi²) | Roods (ro) |
|---|---|
| 1 nmi² | 3390.19 ro |
| 2 nmi² | 6780.38 ro |
| 5 nmi² | 16951 ro |
| 10 nmi² | 33901.9 ro |
| 25 nmi² | 84754.8 ro |
| 50 nmi² | 169510 ro |
| 100 nmi² | 339019 ro |