51.3212—Metric conversion table.
| Inches | Millimeters (mm) |
|---|---|
| 1/8 | 3.2 |
| 1/4 | 6.4 |
| 3/8 | 9.5 |
| 1/2 | 12.7 |
| 5/8 | 15.9 |
| 3/4 | 19.1 |
| 7/8 | 22.2 |
| 1 | 25.4 |
| 11/4 | 31.8 |
| 11/2 | 38.1 |
| 13/4 | 44.5 |
| 2 | 50.8 |
| 21/2 | 63.5 |
| 23/4 | 69.9 |
| 3 | 76.2 |
| 31/2 | 88.9 |
| 4 | 101.6 |
| Inches | Millimeters (mm) |
|---|---|
| 1/8 | 3.2 |
| 1/4 | 6.4 |
| 3/8 | 9.5 |
| 1/2 | 12.7 |
| 5/8 | 15.9 |
| 3/4 | 19.1 |
| 7/8 | 22.2 |
| 1 | 25.4 |
| 11/4 | 31.8 |
| 11/2 | 38.1 |
| 13/4 | 44.5 |
| 2 | 50.8 |
| 21/2 | 63.5 |
| 23/4 | 69.9 |
| 3 | 76.2 |
| 31/2 | 88.9 |
| 4 | 101.6 |