Convert Square Inches to Square Chains
Convert Square Inches (in²) to Square Chains (ch²) instantly and accurately.
Conversion Formula
ch² = in² × 1.594225079e-6
About Square Inches
A square inch (in²) is an imperial unit of area equal to a square with sides of one inch (25.4 mm × 25.4 mm). It is commonly used in the United States for measuring small areas like fabric swatches, screen sizes, or printed materials. A standard business card is about 6 in², and a typical smartphone screen might be 15-20 in². This unit remains prevalent in American manufacturing, printing, and retail.
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 Inches (in²) | Square Chains (ch²) |
|---|---|
| 1 in² | 1.594 × 10-6 ch² |
| 2 in² | 3.188 × 10-6 ch² |
| 5 in² | 7.971 × 10-6 ch² |
| 10 in² | 1.594 × 10-5 ch² |
| 25 in² | 3.986 × 10-5 ch² |
| 50 in² | 7.971 × 10-5 ch² |
| 100 in² | 0.000159423 ch² |