Millimeters to Inches Chart / MM to Carat Weight

 

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