Square Inch [in2] to Square Mile [mi2] Converter

Definition: A square inch (in²) is a unit of area equal to the area of a square that is 1 inch on each side. It is commonly used in the United States and other countries that use the imperial system.

History/origin: The square inch is derived from the inch, which has ancient origins and was traditionally based on the width of a human thumb. Its exact definition has varied throughout history.

Current use: Square inches are used to measure smaller areas, such as the surface area of objects, screens, or printed materials. It's a common unit in manufacturing, design, and everyday measurements in the US.

Definition: A square mile (mi²) is a unit of area equal to the area of a square that is 1 mile on each side. It is commonly used in the United States and other countries that use the imperial system.

History/origin: The square mile is derived from the mile, which has ancient origins and was traditionally based on the distance a Roman legion could march in a certain amount of time.

Current use: Square miles are used to measure very large areas, such as the size of cities, counties, and regions. It's a common unit in geography, cartography, and environmental studies in the US.