You're likely asking how many meters (m) are in 12 millimeters (mm). Here's how to convert:

* 1 meter (m) = 1000 millimeters (mm)

To find out how many meters are in 12 mm, divide 12 by 1000:

* 12 mm / 1000 mm/m = 0.012 m

Therefore, 12 millimeters equals 0.012 meters.