How to Convert Mm3 to M3 (6 Steps)

By Lisa Porter

Mm3 or mm^3 stands for cubic millimeters, and M3 or m^3 stands for cubic meters. Cubic millimeters and cubic meters are metric volume measurements. One meter equals 1,000 millimeters, and so 1 cubic meter equals 1,000 millimeters cubed, or 1,000,000,000 cubic millimeters. If you have a large cubic millimeter measurement, it might be easier to work with the number if you convert it to cubic meters. You can convert a cubic millimeter measurement to a cubic meter measurement using a calculator or a free online unit converter.

Using a Calculator

Step 1

Turn on the calculator.

Step 2

Enter the cubic millimeter value.

Divide by 1,000,000,000. The new value is the cubic meter value.

Using an Online Unit Converter

Step 1

Go to an online unit conversion calculator. Look at or, or follow the Resource links.

Step 2

Enter the cubic millimeter value and click “convert” or “calculate.”

Find the cubic meter value in the second column or box.