The Advance is this times the Spread
To Find the degree of the fitting to use on an offset
| Degree | Multiplier |
| 11¼° | The Advance is 5.027 times the Spread. |
| 5⅝° | The Advance is 10.1532 times the Spread. |
| 11¼° | The Advance is 5.027 times the Spread. |
| 22½° | The Advance is 2.4142 times the Spread. |
| 30° | The Advance is 1.7321 times the Spread. |
| 45° | The Advance is equal to the Spread. |
| 60° | The Advance is .5774 times the Spread. |
| 67½° | The Advance is .4142 times the Spread. |
| 72° | The Advance is .325 times the Spread. |