Choose whether the value is a length in mm, an area in mm², or one side of a rectangle.
mm measures length and mm² measures area. Two dimensions are required to calculate m².
mm
mm
Millimeters to meters
Divide by 1,000. For example, 2,500 mm = 2.5 m.
Square millimeters to square meters
Divide mm² by 1,000,000. One square meter equals 1,000,000 mm².
Area from two millimeter dimensions
Convert length and width to meters, then multiply them. A single length cannot be converted directly to m².