| Fractional Inch - Decimal Inch - Metric Millimetre Conversions | ||||
| Inch Size | Decimal | Metric | ||
| 1 | / | 64 | 0.016 | 0.40 |
| 1 | / | 32 | 0.031 | 0.79 |
| 3 | / | 64 | 0.047 | 1.19 |
| 1 | / | 16 | 0.063 | 1.59 |
| 5 | / | 64 | 0.078 | 1.98 |
| 3 | / | 32 | 0.094 | 2.38 |
| 7 | / | 64 | 0.109 | 2.78 |
| 1 | / | 8 | 0.125 | 3.18 |
| 9 | / | 64 | 0.141 | 3.57 |
| 5 | / | 32 | 0.156 | 3.97 |
| 11 | / | 64 | 0.172 | 4.37 |
| 3 | / | 16 | 0.188 | 4.76 |
| 13 | / | 64 | 0.203 | 5.16 |
| 7 | / | 32 | 0.219 | 5.56 |
| 15 | / | 64 | 0.234 | 5.95 |
| 1 | / | 4 | 0.250 | 6.35 |
| 17 | / | 64 | 0.266 | 6.75 |
| 9 | / | 32 | 0.281 | 7.14 |
| 19 | / | 64 | 0.297 | 7.54 |
| 5 | / | 16 | 0.313 | 7.94 |
| 21 | / | 64 | 0.328 | 8.33 |
| 11 | / | 32 | 0.344 | 8.73 |
| 23 | / | 64 | 0.359 | 9.13 |
| 3 | / | 8 | 0.375 | 9.53 |
| 25 | / | 64 | 0.391 | 9.92 |
| 13 | / | 32 | 0.406 | 10.32 |
| 27 | / | 64 | 0.422 | 10.72 |
| 7 | / | 16 | 0.438 | 11.11 |
| 29 | / | 64 | 0.453 | 11.51 |
| 15 | / | 32 | 0.469 | 11.91 |
| 31 | / | 64 | 0.484 | 12.30 |
| 1 | / | 2 | 0.500 | 12.70 |