Convert Square Chains to Square Megameters
Convert Square Chains (ch²) to Square Megameters (Mm²) instantly and accurately.
Conversion Formula
Mm² = ch² × 4.046856422e-10
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 Megameters
A square megameter (Mm²) equals the area of a square with sides of one million meters - 10¹² m², or one trillion square meters. At this scale we describe major geographic and planetary regions. The entire land surface of Earth is about 149 Mm², the Indian Ocean covers roughly 70 Mm², and the Sahara Desert spans approximately 9.2 Mm². Square megameters provide a convenient scale for comparing continent-sized areas without resorting to hundreds of millions of square kilometers.
Quick Reference Table
| Square Chains (ch²) | Square Megameters (Mm²) |
|---|---|
| 1 ch² | 4.047 × 10-10 Mm² |
| 2 ch² | 8.094 × 10-10 Mm² |
| 5 ch² | 2.023 × 10-9 Mm² |
| 10 ch² | 4.047 × 10-9 Mm² |
| 25 ch² | 1.012 × 10-8 Mm² |
| 50 ch² | 2.023 × 10-8 Mm² |
| 100 ch² | 4.047 × 10-8 Mm² |