You can reference the chart below to approximate conversion of millimeters to inches. Think about 25 mm to an inch or about 12.5 to 1/2 inch. Not as hard to convert knowing those quick comparisons.
Millimeters to inches Conversion Table
How many inches are in 60 mm? How many mm are in an inch? Wondering what size those earrings or pendants are? This will show the approximate inch size of items measured in millimeters.
The fraction inches are rounded to 1/64 resolution.
One inch is approximately 24.5 millimeters. Therefore, a 38 mm necklace would be approximately 1.5 inches.
MM to Carats Stone Conversion
This chart will help with the approximate carat weight equivalent for CZ's. Measurements are approximate and shown for reference.
Definition: A millimeter (symbol: mm) is a unit of length in the International System of Units (SI). It is defined in terms of the meter, as 1/1000 of a meter, or the distance traveled by light in 1/299 792 458 000 of a second.
History/origin: The milli- prefix is one of many metric prefixes. It indicates one thousandth of the base unit, in this case the meter. The definition of the meter has changed over time, the current definition being based on the distance traveled by the speed of light in a given amount of time. The relationship between the meter and the millimeter is constant however. Prior to the current definition, the meter was based on the length of a prototype meter bar. As with all SI units, the definition of the meter is subject to change, and it is possible that a new definition of the meter will be in place in the future.
Definition: An inch (symbol: in) is a unit of length in the imperial and US customary systems of measurement. An inch was defined to be equivalent to exactly 25.4 millimeters in 1959. There are 12 inches in a foot and 36 inches in a yard.
History/origin: The term "inch" was derived from the Latin unit "uncia" which equated to "one-twelfth" of a Roman foot.
There have been a number of different standards for the inch in the past, with the current definition being based on the international yard. One of the earliest definitions of the inch was based on barleycorns, where an inch was equal to the length of three grains of dry, round barley placed end-to-end. Another version of the inch is also believed to have been derived from the width of a human thumb, where the length was obtained from averaging the width of three thumbs: a small, a medium, and a large one.
Current use: The inch is mostly used in the United States, Canada, and the United Kingdom. It is also sometimes used in Japan (as well as other countries) in relation to electronic parts, like the size of display screens.
Millimeter to Inch Conversion Table
|Millimeter [mm]||Inch [in]|
|0.01 mm||0.0003937008 in|
|0.1 mm||0.0039370079 in|
|1 mm||0.0393700787 in|
|2 mm||0.0787401575 in|
|3 mm||0.1181102362 in|
|5 mm||0.1968503937 in|
|10 mm||0.3937007874 in|
|20 mm||0.7874015748 in|
|50 mm||1.968503937 in|
|100 mm||3.937007874 in|
|1000 mm||39.3700787402 in|