Standard gauge to mm and Inch conversion chart
| B&S Gauge | Inch | mm |
| 1 | 0.289 | 7.348 |
| 2 | 0.258 | 6.543 |
| * | .250 ( 1/4) | 6.35 |
| * | .234 ( 15/64) | 5.953 |
| 3 | 0.229 | 5.827 |
| * | .219 ( 7/32) | 5.556 |
| 4 | 0.204 | 5.189 |
| * | .203 (13/64) | 5.154 |
| * | .188 (3/16) | 4.762 |
| 5 | 0.182 | 4.621 |
| * | .172 (11/64) | 4.366 |
| 6 | 0.162 | 4.115 |
| * | .156 ( 5/32 ) | 3.969 |
| 7 | 0.144 | 3.664 |
| * | .141 ( 9/64 ) | 3.572 |
| 8 | 0.128 | 3.263 |
| * | .125 ( 1/8 ) | 3.175 |
| 9 | 0.114 | 2.906 |
| * | .109 ( 7/64 ) | 2.778 |
| 10 | 0.102 | 2.588 |
| * | .094 ( 3/32 ) | 2.381 |
| 11 | 0.091 | 2.304 |
| 12 | 0.081 | 2.052 |
| * | .078 ( 5/64 ) | 1.984 |
| 13 | 0.072 | 1.828 |
| 14 | 0.064 | 1.628 |
| * | .063 ( 1/16) | 1.588 |
| 15 | 0.057 | 1.449 |
| 16 | 0.051 | 1.291 |
| * | .047 ( 3/64 ) | 1.191 |
| 17 | 0.045 | 1.149 |
| 18 | 0.04 | 1.024 |
| 19 | 0.036 | 0.912 |
| 20 | 0.032 | 0.812 |
| * | .031 ( 1/32 ) | 0.795 |
| 21 | 0.028 | 0.723 |
| 22 | 0.025 | 0.644 |
| 23 | 0.023 | 0.573 |
| 24 | 0.02 | 0.511 |
| 25 | 0.018 | 0.455 |
| 26 | 0.016 | 0.405 |
| * | .016 ( 1/64 ) | 0.396 |
| 27 | 0.014 | 0.36 |
| 28 | 0.013 | 0.321 |
| 29 | 0.011 | 0.286 |
| 30 | 0.01 | 0.255 |
| 31 | 0.0089 | 0.226 |
| 32 | 0.008 | 0.2 |
| 33 | 0.0071 | 0.18 |
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Gauge Size Chart Gauge Size Chart For Metal Aluminum Gauge To MM
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