How to correlate the Ceramill MAGNIFICATION FACTOR with Zirconia SHRINKAGE FACTOR

Ceramill milling equipment allows to adjust magnification factor between 1 and 8. Regular Zirconia blanks have a shirnkage factor of about 1.250. I would like to know if there is a linear correlation between these two scales, so given a certain shrinkage factor I can easily translate it into the magnification factor for Ceramill. Thanks