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. Tips Writer Bio
