Hi @ptrblck - Thanks for sharing the “conv arithmmetic” tutorial. I checked this tutorial before as well. I am still confused on padding. Consider the first case when I used padding=1. Note I didn’t use dilation. So, according to the PyTorch document (“dilation * (kernel_size - 1) - padding”) which equals to (0*(2-1)-1) = -1 amount of padding will be added. This does not make any sense to me. Am I doing any mistake?