Millimeters to Inches Chart / MM to Carat Weight

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Click link to open conversion page: Free Millimeter to Inches Conversion Website

 

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.

Millimeters (mm) Inches (")
(decimal)
Inches (")
(fraction)
0.01 mm 0.0004 ″ 0 ″
0.1 mm 0.0039 ″ 0 ″
1 mm 0.0394 ″ 3/64 ″
2 mm 0.0787 ″ 5/64 ″
3 mm 0.1181 ″ 1/8 ″
4 mm 0.1575 ″ 5/32 ″
5 mm 0.1969 ″ 13/64 ″
6 mm 0.2362 ″ 15/64 ″
7 mm 0.2756 ″ 9/32 ″
8 mm 0.3150 ″ 5/16 ″
9 mm 0.3543 ″ 23/64 ″
10 mm 0.3937 ″ 25/64 ″
20 mm 0.7874 ″ 25/32 ″
30 mm 1.1811 ″ 1 3/16 ″
40 mm 1.5784 ″ 1 37/64 ″
50 mm 1.9685 ″ 1 31/32 ″
60 mm 2.3622 ″ 2 23/64 ″
70 mm 2.7559 ″ 2 3/4 ″
80 mm 3.1496 ″ 3 5/32 ″
90 mm 3.5433 ″ 3 35/64 ″
100 mm 3.9370 ″ 3 15/16 ″
 

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.

Carat Size Round Shape MM Pear Shape MM Marquise Shape MM Oval Shape MM Octagon Shape MM Heart Shape MM Trillion Shape MM Square Shape MM
.005 1.0              
.0067 1.15              
.0075 1.12              
.01 1.3              
.015 1.5              
.02 1.7              
.025 1.8              
.03 2.0             1.5x1.5
.035 2.1   2.5x1.25          
.04 2.2   3x1.5         1.75x1.75
.05 2.4              
.06 2.5   3.5x1.75         2x2
.07 2.7   3.5x2         2.25x2.25
.08 2.8       2.8x2.1      
.09 2.9 3x2.5 4x2          
.10 3.0           3x3x3 2.5x2.5
.11 3.1   4.25x2.25          
.12 3.2 4x2.5     3.3x2.5 3x3    
.14 3.3 4x3 4.5x2.5       3.5x3.5x3.5 2.75x2.75
.15 3.4   5x2.5   3.5x2.6      
.16 3.5 4.5x3            
.17 3.6             3x3
.18 3.7           4x4x4  
.20 3.8 5x3 5x3 4x3 3.9x2.9 3.5x3.5   3.25x3.25
.22 3.9              
.23 4.0             3.5x3.5
.25 4.1   6x3 5x3 4.2x3.1 4x4 4.5x4.5x4.5  
.30 4.2 5.5x3.5 6x3.5         3.75x3.75
.33 4.4       5x3   5x5x5  
.38 4.6   7x3.5 5x4   4.5x4.5    
.40 4.8           5.5x5.5x5.5 4x4
.47 5.0              
.50 5.2 6x4 8x4 6x4 5.2x3.9 5x5   4.5x4.5
.60 5.4              
.65 5.6         5.5x5.5    
.75 5.8 7x5 9x4.5   6x4 6x6   5x5
.80 6.0       6x4.5      
.95 6.4              
1.00 6.5 8x5 10x5 7x5 7x5 6.5x6.5 7x7x7 5.5x5.5
1.10 6.6              
1.17 6.8              
1.25 7.0     7.5x5.5     8x8x8 6x6
1.33 7.2              
1.50 7.4 9x6 11x5.5 8x6 8x6 7x7 9x9x9 6.5x6.5
1.60 7.6              
1.75 7.8              
1.90 8.0              
2.00 8.2 10x7 12x6 8.5x6.5 8.5x6.5 8x8 10x10x10 7.5x7.5
2.15 8.4              
2.25 8.6              
2.50 8.8 12x7 13x6.5 9x7 9x7 8.5x8.5   8x8
2.85 9.2              
3.00 9.4 12x8 14x7 10x8 10x8 9x9   8.5x8.5
3.15 9.6              
3.35 9.8              
3.50 10.0 13x8 14x7.5 10x8.5   9.5x9.5    
3.75 10.2              
4.00 10.4 14x8 16x8 11x9 11x9 10x10   9x9
4.25 10.6              
4.50 10.8 14.5x9   11x9.5   10.5x10.5    
4.75 11.0              
5.00 11.2 15x9 16x8.5 12x10 12x10 11x11   9.5x9.5
Home / Length Conversion / Convert mm to inches
Millimeter

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.

Inch

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