Convert Square Chains to Roods
Convert Square Chains (ch²) to Roods (ro) instantly and accurately.
Conversion Formula
ro = ch² × 0.4
About Square Chains
A square chain (ch²) is a surveying unit equal to the area of a square with sides of one Gunter's chain (66 feet or ~20.12 m), approximately 404.69 m². Ten square chains equal exactly one acre, making it the natural subdivision unit in traditional land surveying. The US Public Land Survey System used chains to lay out townships and sections, and square chains appear throughout old legal property descriptions and government land grants across North America. One square chain equals exactly 16 square rods.
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 Chains (ch²) | Roods (ro) |
|---|---|
| 1 ch² | 0.4 ro |
| 2 ch² | 0.8 ro |
| 5 ch² | 2 ro |
| 10 ch² | 4 ro |
| 25 ch² | 10 ro |
| 50 ch² | 20 ro |
| 100 ch² | 40 ro |