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Square Millimeters to Square Inches

Convert measurements between Square Millimeters and Square Inches.

Common conversions

10mm² = 0.0155 in²
50mm² = 0.0775 in²
100mm² = 0.155 in²
240mm² = 0.372 in²
320mm² = 0.496 in²
550mm² = 0.8525 in²

Conversion information

1 Square Millimeters = 0.00155 Square Inches

The square millimeter is used in precision measurements
The square inch is used in the United States and United Kingdom

Frequently Asked Questions

What is a square millimeter?
It is a unit of area equal to a square with 1 mm sides.
Where is mm² used?
In engineering, electronics, and small component design.