| Ounce | Millimetre | Inch | Decimal |
|---|---|---|---|
| 1 | .40 | 1/64" | .015625 |
| 2 | .80 | 1/32" | .03125 |
| 3 | 1.20 | 3/64" | .046875 |
| 4 | 1.60 | 1/16" | .0625 |
| 5 | 2.00 | 5/64" | .078125 |
| 6 | 2.40 | 3/32" | .09375 |
| 7 | 2.80 | 7/64" | .109375 |
| 8 | 3.20 | 1/8" | .125 |
| 9 | 3.60 | 9/64" | .140625 |
| 10 | 4.00 | 5/32" | .15625 |
| 11 | 4.40 | 11/64" | .171875 |
| 12 | 4.80 | 3/16" | .1875 |
| 13 | 5.20 | 13/64" | .203125 |
| 14 | 5.60 | 7/32" | .21875 |
| 15 | 6.00 | 15/64" | .23437 |
| 16 | 6.40 | 1/4" | .250 |
| 17 | 6.80 | 17/64" | .26563 |
| 18 | 7.20 | 9/32" | .28125 |
| 19 | 7.60 | 19/64" | .29687 |
| 20 | 8.00 | 5/16" | .3125 |