Download the excellent program written by Wilfried Burmeister at **broken link removed**
It will calculate all of the values for you for air core, toroid inductors. There is a fairly good tutorial included in the HELP screen that will explain what calculations are being made and how.
One option is to use cores of known AL ..
The beauty of this solution is that you really don't need to measure these inductors ..
More details here: https://hem.passagen.se/communication/vc.html