Yes EQ6 will calculate the block sized up or down, and calculate the differences in your yardage as well. If you want to get a inexpensive program to play with the Electric quilt Company's Quilt Wizard is a good place to start. You can size up and down blocks in the quilt wizard too. The difference is you don't have the freedom todraw in your own designs, make quilt labels, have about 5000 different fabrics loaded into the program.