# Convert square inches to square millimeters

### square inches definition

The Square Inch is a British Imperial unit of area equal to equal to one inch by one inch square or 0.00064516 square meters.
### square millimeters definition

The Square Millimeter is a metric unit of area enclosed by a square with sides of one millimeter. A Square Millimeter equals to 1/100 of a square cenimeter

Please enter square inches value in the first input field, and you'll see the result value in square millimeters in the second field.

See also: Convert square millimeters to square inches

Metric Conversion