The new method of estimating the Limiting Drawing Ratio (L.D.R.) in deep-drawing makes use of oversize blanks with standard diameters. Experimental results indicate that the bulge depth at fracture, to blank diameter curves for oversize blanks can be expressed by a particular type of an exponential expression. To evaluate the parameters in the equation, three tests until fracture, using three different oversize blanks are necessary. The bulge depth and blank diameter data are then used in the solution of the three simultaneous equations. This calculation is best performed on a computer to obtain high accuracy. Thus the limiting blank size and L.D.R. can be calculated