Square Meter (m²) to Square Millimeter (mm²) Conversion

Definition: A square meter (symbol: m²) is the SI derived unit of area. It is defined as the area of a square with sides measuring exactly one meter in length. This is the fundamental unit for measuring two-dimensional spaces in the metric system.

History: The square meter was introduced as part of the metric system during the French Revolution in the 1790s. Its definition has evolved with the meter's redefinitions, most recently tying it to the speed of light in 1983. As the meter was redefined, the square meter automatically adjusted while maintaining its fundamental relationship.

Current use: Used worldwide for measuring room sizes, construction areas, and land parcels in metric countries. It's the standard unit in architecture, engineering, and real estate everywhere except the United States. Even in countries that use imperial units for distance, square meters are often used for technical and scientific applications.