Gauge Table
The table below offers the conversion of fractional inches, decimal inches, and millimeters cross-referenced to the B&S Gauge. This is a convenient table to reference to determine the gauge you are planning to order on karat gold, sterling silver, platinum or base metal material.
Fractional Inch 1/100 thru 3/32
FRACTIONAL INCH |
DECIMAL INCH |
M/M | B & S GAUGE |
1/100 | 0.010 | 0.25 | 30 |
0.011 | 0.28 | 29 | |
0.012 | 0.30 | 28 | |
0.014 | 0.36 | 27 | |
1/64 | 0.016 | 0.40 | 26 |
0.018 | 0.46 | 25 | |
0.020 | 0.50 | 24 | |
0.022 | 0.56 | 23 | |
0.024 | 0.60 | ||
0.025 | 0.64 | 22 | |
0.028 | 0.70 | 21 | |
0.030 | 0.75 | ||
1/32 | 0.031 | 0.80 | |
0.032 | 0.82 | 20 | |
0.035 | 0.90 | ||
0.036 | 0.90 | 19 | |
0.040 | 1.00 | 18 | |
0.043 | 1.10 | ||
0.045 | 1.14 | 17 | |
3/64 | 0.047 | 1.20 | |
0.049 | 1.25 | ||
0.051 | 1.30 | 16 | |
0.055 | 1.40 | ||
0.057 | 1.45 | 15 | |
0.059 | 1.50 | ||
1/16 | 0.063 | 1.60 | 14 |
0.067 | 1.70 | ||
0.071 | 1.80 | ||
0.072 | 1.83 | 13 | |
0.075 | 1.90 | ||
5/64 | 0.079 | 2.00 | |
0.081 | 2.06 | 12 | |
0.083 | 2.10 | ||
0.087 | 2.20 | ||
0.091 | 2.30 | 11 | |
3/32 | 0.094 | 2.40 | |
0.098 | 2.50 | ||
0.102 | 2.59 | 10 |
Fractional Inch 7/64 thru 1
FRACTIONAL INCH |
DECIMAL INCH |
M/M | B & S GAUGE |
7/64 | 0.108 | 2.75 | |
0.114 | 2.90 | 9 | |
0.118 | 3.00 | ||
1/8 | 0.125 | 3.175 | |
0.128 | 3.25 | 8 | |
0.138 | 3.50 | ||
0.144 | 3.66 | 7 | |
0.148 | 3.75 | ||
5/32 | 0.156 | 4.00 | |
0.162 | 4.12 | 6 | |
0.167 | 4.25 | ||
0.177 | 4.50 | ||
0.182 | 4.62 | 5 | |
3/16 | 0.187 | 4.75 | |
0.196 | 5.00 | ||
0.204 | 5.18 | 4 | |
0.207 | 5.25 | ||
0.217 | 5.50 | ||
0.226 | 5.75 | ||
0.236 | 6.00 | ||
0.246 | 6.25 | ||
1/4 | 0.250 | 6.35 | |
5/16 | 0.3125 | 7.938 | |
3/8 | 0.375 | 9.525 | |
7/16 | 0.4375 | 11.112 | |
1/2 | 0.500 | 12.70 | |
9/16 | 0.5625 | 14.288 | |
5/8 | 0.625 | 15.875 | |
11/16 | 0.6875 | 17.462 | |
3/4 | 0.750 | 19.05 | |
13/16 | 0.8125 | 20.638 | |
7/8 | 0.875 | 22.225 | |
15/16 | 0.9375 | 23.812 | |
1 | 1.000 | 25.40 |

Let's Stay In Touch
Share your email address with us so we can keep you up-to-date on featured products, company news, and more.
Copyright© 2019 W.R. Cobb Company. This website, the images, logos, and content herein are the exclusive property of the W.R. Cobb Company and may not be used or reproduced without the prior written consent of W.R. Cobb Company.