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Millimeters are fractions of a meter. There are 1000 mm in 1m. The easiest way to find the number of meters in a given quantity of millimeters is to divide by 1000. Since square measures are made by multiplying lengths and widths, 1 square meter (1mx1m) is equal to 1,000,000 square millimeters (1000mmx1000mm.) To find a number of square meters in an area of square millimeters, you can divide the given area by 1million.

For example:

A square with sides measuring 123mm has an area of 15129mm^2.

Dividing that number by 1million converts it to 0.015129m^2

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Q: How do you convent square millimeters to square meters?
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