Metric Conversions
The purpose of this document is to provide metric conversions for all listed ring sizes (by wire and mandrel diameter) used on this website. Soon I'll likely start listing metric values beside the imperial ones, but for now these charts will have to do.
The conversion used is simple: inches * 25.4 = mm. For example, a ring with a mandrel diameter of 1/4" would be (0.25 * 25.4 = 6.35 mm).
Wire Diameters | Listed Ring Mandrel Diameters |
|---|
| Inches | Millimeters |
|---|
| 0.015" | 0.381 mm | | 0.016" | 0.4064 mm | | 0.019" | 0.4826 mm | | 0.020" | 0.508 mm | | 0.025" | 0.635 mm | | 0.028" | 0.7112 mm | | 0.030" | 0.762 mm | | 0.032" | 0.8128 mm | | 0.034" | 0.8636 mm | | 0.035" | 0.889 mm | | 0.036" | 0.9144 mm | | 0.038" | 0.9652 mm | | 0.040" | 1.016 mm | | 0.041" | 1.0414 mm | | 0.045" | 1.143 mm | | 0.046" | 1.1684 mm | | 0.047" | 1.1938 mm | | 0.048" | 1.2192 mm | | 0.049" | 1.2446 mm | | 0.050" | 1.27 mm | | 0.052" | 1.3208 mm | | 0.057" | 1.4478 mm | | 0.061" | 1.5494 mm | | 0.062" | 1.5748 mm | | 0.063" | 1.6002 mm | | 0.064" | 1.6256 mm | | 0.065" | 1.651 mm | | 0.068" | 1.7272 mm | | 0.072" | 1.8288 mm | | 0.078" | 1.9812 mm | | 0.080" | 2.032 mm | | 0.085" | 2.159 mm | | 0.086" | 2.1844 mm | | 0.094" | 2.3876 mm | | 0.100" | 2.54 mm | | 0.101" | 2.5654 mm | | 0.105" | 2.667 mm | | 0.123" | 3.1242 mm |
| | Listed Size | Decimal Inches | Millimeters |
|---|
| .040" | 0.04000" | 1.016 mm | | .045" | 0.04500" | 1.143 mm | | 3/64" | 0.04688" | 1.190752 mm | | .048" | 0.04800" | 1.2192 mm | | 7/128" | 0.05469" | 1.389126 mm | | .057" | 0.05700" | 1.4478 mm | | 1/16" | 0.06250" | 1.5875 mm | | 9/128" | 0.07031" | 1.785874 mm | | .072" | 0.07200" | 1.8288 mm | | .075" | 0.07500" | 1.905 mm | | 5/64" | 0.07813" | 1.984502 mm | | .080" | 0.08000" | 2.032 mm | | 11/128" | 0.08594" | 2.182876 mm | | 2.25mm | 0.08858" | 2.249932 mm | | 3/32" | 0.09375" | 2.38125 mm | | 2.5mm | 0.09843" | 2.500122 mm | | 13/128" | 0.10156" | 2.579624 mm | | 7/64" | 0.10938" | 2.778252 mm | | .115" | 0.11500" | 2.921 mm | | 15/128" | 0.11719" | 2.976626 mm | | 1/8" | 0.12500" | 3.175 mm | | 3.25mm | 0.12795" | 3.24993 mm | | 17/128" | 0.13281" | 3.373374 mm | | 9/64" | 0.14063" | 3.572002 mm | | 19/128" | 0.14844" | 3.770376 mm | | 5/32" | 0.15625" | 3.96875 mm | | 21/128" | 0.16406" | 4.167124 mm | | 4.25mm | 0.16732" | 4.249928 mm | | 11/64" | 0.17188" | 4.365752 mm | | 23/128" | 0.17969" | 4.564126 mm | | 3/16" | 0.18750" | 4.7625 mm | | 25/128" | 0.19531" | 4.960874 mm | | 13/64" | 0.20313" | 5.159502 mm | | 5.25mm | 0.20669" | 5.249926 mm | | 27/128" | 0.21094" | 5.357876 mm | | 7/32" | 0.21875" | 5.55625 mm | | 29/128" | 0.22656" | 5.754624 mm | | 15/64" | 0.23438" | 5.953252 mm | | 31/128" | 0.24219" | 6.151626 mm | | 6.25mm | 0.24606" | 6.249924 mm | | 1/4" | 0.25000" | 6.35 mm | | 33/128" | 0.25781" | 6.548374 mm | | 17/64" | 0.26563" | 6.747002 mm | | 35/128" | 0.27344" | 6.945376 mm | | 9/32" | 0.28125" | 7.14375 mm | | 19/64" | 0.29688" | 7.540752 mm | | 5/16" | 0.31250" | 7.9375 mm | | 21/64" | 0.32813" | 8.334502 mm | | 11/32" | 0.34375" | 8.73125 mm | | 23/64" | 0.35938" | 9.128252 mm | | 3/8" | 0.37500" | 9.525 mm | | 25/64" | 0.39063" | 9.922002 mm | | 13/32" | 0.40625" | 10.31875 mm | | 27/64" | 0.42188" | 10.715752 mm | | 7/16" | 0.43750" | 11.1125 mm | | 29/64" | 0.45313" | 11.509502 mm | | 15/32" | 0.46875" | 11.90625 mm | | 31/64" | 0.48438" | 12.303252 mm | | 1/2" | 0.50000" | 12.7 mm | | 77/128" | 0.60156" | 15.279624 mm | | .778" | 0.77800" | 19.7612 mm | | 1" | 1.00000" | 25.4 mm |
|
