* Cubic Meter: A cubic meter (m³) is a volume measurement equivalent to a cube with sides of 1 meter each.

* Millimeter: A millimeter (mm) is a unit of length equal to one-thousandth of a meter (1 mm = 0.001 m).

Conversion:

To find out how many cubic meters are in a cubic millimeter, we need to cube the conversion factor between millimeters and meters:

1 mm = 0.001 m

(1 mm)³ = (0.001 m)³

1 mm³ = 0.000000001 m³

Therefore, there are 0.000000001 cubic meters in a cubic millimeter.