Eddy current calculations

Hi all i hope some one can help but i have a feeling there will be no easy calculations for this one:confused:

Im trying to calculate actual eddy current losses in 50hz mains transformers depending on lamination sizes and cant seem to find any info on the subject thats sub electrical degree level. Im not looking to produce figures accurate to a milliwatt just relative numbers for comparison purposes



Can anyone help?

Thanks in advance

Harry