mm²
Square Millimeter
Metric System

Square Millimeter (mm²)

A square millimeter (mm²) equals 0.00155 square inches or 0.01 square centimeters. Square millimeters measure wire cross-sections, component sizes, and precision engineering. Electrical wire sizes are often specified in mm² (e.g., 2.5 mm² wire).

Convert From Square Millimeters

Convert To Square Millimeters

Conversion Factors

1 mm² 1e-12 km²
1 mm² 1e-10 ha
1 mm² 1e-6 m²
1 mm² 0.01 cm²
1 mm² 3.8610215854e-13 mi²
1 mm² 2.4710538147e-10 acre
1 mm² 1.1959900463e-6 yd²
1 mm² 1.0763910417e-5 ft²
1 mm² 0.0015500031 in²

Related Units