Convert square millimeters (mm²) to square centimeters, meters, inches, and other area units.
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The square millimeter (mm²) is a metric unit of area equal to the area of a square with sides of one millimeter. Used in engineering, microelectronics, medicine, and print, where high precision is required.
Common Square Millimeter Conversions
- 1 mm² = 0.01 cm² — one hundred square millimeters equal one square centimeter.
- 1 mm² = 0.000001 m² — one million square millimeters equal one square meter.
- 1 mm² ≈ 0.00155 in² — multiply by 0.00155 to get square inches.
- 645.16 mm² = 1 in² — exact value by definition.
Square millimeters are the standard in technical documentation and engineering drawings. They are also used to denote the cross-sectional area of wires and cables in electrical engineering.