This is a convenient online *ruler* that could be calibrated to actual *size*, measurements in *cm*, mm and inch, the upper half is the millimeter *ruler* and *centimeter* .

*Rulers* are often 30 *centimeters long*, which are designated by *large* numbers on the *ruler*. Between each *centimeter* (*cm*) mark, there should be 10 smaller marks called millimeters (mm).

The numbers on the ruler represent centimeters (cm). There are *10 millimeters* for each centimeter.

. *ruler* or 2. Measure in inches and multiply by 2.54, the number of *cm* in an inch.. So, the standard 12 inch *ruler* used in school usually has numbers 1â€“30 on the other edge.. *Where* might one find a *ruler* that only measures decimeters?

The conversion between inches and *centimeters* is given more precisely in the vCalc equation: *Length* Conversion You just input the *length* you wish to convert