A millimeter (mm, millimetre) is a unit of length in the metric system, equal to one thousandth of a meter (m). How big is 1mm? 1mm is 1/1000th of a meter. A meter is 39.37 inches, so 1mm is 1/1000th of 39.37 inches, or 0.03937 inches. What is the mm in math? The mm in math is the millimeter. It is a unit of length that is equal to one thousandth of a meter. What symbol is a millimeter? There is no universal symbol for "millimeter". In the SI system of units, the symbol for the unit of length is "m" (for meter). In some other systems of units, the symbol for the unit of length is "mm" (for millimeter). Is 20mm same as 1 inch? No, one inch is equal to 25.4 mm.

#### Which is bigger cm or mm?

The answer to this question depends on the context in which it is being asked. In the metric system of measurement, the prefix "centi" indicates one hundredth, while the prefix "milli" indicates one thousandth. Therefore, one centimeter (cm) is equal to ten millimeters (mm). In other words, cm are bigger than mm.