Square Millimeter to Square Inch Converter

How to convert square millimeters to square inches?

To convert square millimeters to square inches, you can use the following conversion factor: **1 in² = 645.16 mm²**. Simply multiply by 0.00155 to get the equivalent area in square inches.

A_(in²) = A_(mm²) × 0.00155

Example

Convert 100 mm² to square inches:

A_(in²) = 100mm² × 0.00155 = 0.155in²

How many square inches in a square millimeter?

1 mm² = 0.00155 in²

1 mm² = 0.00155 in²

How many square millimeters in a square inch?

1 in² = 645.16 mm²

1 in² = 645.16 mm²

What is a Square Millimeter?

A square millimeter (mm²) is a metric unit of area equal to the area of a square with sides of one millimeter. It equals 0.000001 square meters. Square millimeters are used for measuring very small areas such as cross-sections of wires, small components, and microscopic surfaces.

What is a Square Inch?

A square inch (in²) is a unit of area in the imperial system equal to the area of a square with sides of one inch. It equals 1/144 square feet or approximately 6.45 square centimeters. Square inches are commonly used for measuring small areas such as screens, paper, and small objects.

Popular square millimeter to square inch conversion table