Convert MM to Inches (mm to inches convertor)

Use below chart to convert mm to inches and approximate lengths.
mm Inches Inches
1 0.04 1/32 inch
2 0.08 1/16 inch
3 0.12 3/32 inch
4 0.16 1/8 inch
5 0.20 3/16 inch
6 0.24 Just under 1/4 inch
7 0.28 Just over 1/4 inch
8 0.31 5/16 inch
9 0.35 Just under 3/8 inch
10 0.39 Just over 3/8 inch
11 0.43 7/16 inch
12 0.47 Just under 1/2 inch
13 0.51 Just over 1/2 inch
14 0.55 9/16 inch
15 0.59 Just under 5/8 inch
16 0.63 5/8 inch
17 0.67 Just under 11/16 inch
18 0.71 Just over 3/4 inch
19 0.75 Just over 3/5 inch
20 0.79 Just under 13/16 inch
21 0.83 Just over 13/16 inch
22 0.87 Just under 7/8 inch
23 0.91 Just over 7/8 inch
24 0.94 15/16 inch
25 0.98 1 inch
26 1.02 1 and 1/32 inch
27 1.06 1 and 1/16 inch
28 1.10 1 and 3/32 inch
29 1.14 1 and1/8 inch
30 1.18 1 and 3/16 inch
31 1.22 Just under 1 and 1/4 inch
32 1.26 Just over 1 and 1/4 inch
33 1.30 1 and 5/16 inch
34 1.34 Just under 1 and 3/8 inch
35 1.38 Just over 1 and 3/8 inch
36 1.42 1 and7/16 inch
37 1.46 Just under 1 and 1/2 inch
38 1.50 Just over 1 and 1/2 inch
39 1.54 1 and 9/16 inch
40 1.57 Just under 1 and 5/8 inch
41 1.61 1 and 5/8 inch
42 1.65 Just under 1 and 11/16 inch
43 1.69 Just over 1 and 3/4 inch
44 1.73 Just over 1 and 3/5 inch
45 1.77 Just under 1 and 13/16 inch
46 1.81 Just over 1and 13/16 inch
47 1.85 Just under 1 and 7/8 inch
48 1.89 Just over 1 and 7/8 inch
49 1.93 1 and 15/16 inch
50 1.97 2 inches
For comparison, here are the Thickness measurements of some common US coins: For you to get clearer understanding of how thick or wide is a piece of jewelry, you can use US coins for reference. For thicker items you can stack multiple coins to acquire the approximate thickness or the width of your selected jewelry.
  • Dime Thickness is 1.35mm and Diameter is 17.9mm
  • Penny Thickness is 1.55mm and Diameter is 19.05mm
  • Nickel Thickness is 1.95mm and Diameter is 21.21mm
  • Quarter Thickness is 1.75mm and Diameter is 24.26mm