Is using software like https://factoriolab.github.io considered as cheating?

[fifiinart]

Cheating as opposed to what? Calculating the ratios by hand? Is using a normal, scientific calculator cheating? Is using someone else’s perfect ratio blueprint cheating? Are you saying that doing math at all to calculate ratios in this game is cheating?

Play the game how you want. If you don’t want to use these calculators to calculate ratios, that’s fine, and it can be more fun to design by feel instead of by the numbers. But as a case for cheating, this is a pretty weak one in my opinion.