Convert Section (section) to Square Mil (mil²) instantly.
About these units
Section (section)
A section is a unit of area equal to one square mile, or 640 acres, derived from the PLSS township system. Each township contains 36 sections arranged in a 6-by-6 grid. Sections were historically granted to settlers, railroads, and states for development, education funding, and agricultural expansion. Because a section is large but manageable, it provided a logical unit for dividing land among homesteaders. Even today, the section persists as a foundation of rural property boundaries. Many farms, ranches, and municipal boundaries reference section lines, reflecting how 19th-century surveying still shapes 21st-century land use.
Square Mil (mil²)
A square mil equals the area of a square one mil (0.001 inch) on each side, producing an area of one-millionth of a square inch. This tiny unit appears in microfabrication, thin-film manufacturing, and fine electronic component design. Engineers rely on mils and mil² for PCB trace design, wire bonding pads, and micro-mechanical parts. Despite modern efforts to shift toward metric units, mils remain deeply embedded in American electronics manufacturing due to legacy tooling and engineering standards.