Convert Square Miles to Square Chains
Convert Square Miles (mi²) to Square Chains (ch²) instantly and accurately.
Conversion Formula
ch² = mi² × 6400
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.
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.
Quick Reference Table
| Square Miles (mi²) | Square Chains (ch²) |
|---|---|
| 1 mi² | 6400 ch² |
| 2 mi² | 12800 ch² |
| 5 mi² | 32000 ch² |
| 10 mi² | 64000 ch² |
| 25 mi² | 160000 ch² |
| 50 mi² | 320000 ch² |
| 100 mi² | 640000 ch² |