Convert Square Chains to Square Miles
Convert Square Chains (ch²) to Square Miles (mi²) instantly and accurately.
Conversion Formula
mi² = ch² × 0.00015625
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 Square Miles
A square mile (mi²) is an imperial unit of area equal to a square with sides of one mile (5,280 ft × 5,280 ft). It is used for measuring large land areas like counties, states, and countries in the United States. Los Angeles covers about 503 mi², Rhode Island (smallest US state) is roughly 1,214 mi², and Alaska is about 665,384 mi². This unit is standard in American geography, land surveying, and regional planning.
Quick Reference Table
| Square Chains (ch²) | Square Miles (mi²) |
|---|---|
| 1 ch² | 0.00015625 mi² |
| 2 ch² | 0.0003125 mi² |
| 5 ch² | 0.00078125 mi² |
| 10 ch² | 0.0015625 mi² |
| 25 ch² | 0.00390625 mi² |
| 50 ch² | 0.0078125 mi² |
| 100 ch² | 0.015625 mi² |