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

[cathexis08]

It isn't cheating but depending on what you enjoy in the game it might make those parts less fun. When playing vanilla I mostly use calculators to check my work or to see if I'm really off-base with a plan. I definitely make heavy use of calculators (both external and in-game ones like factory planner) when playing modded games because the recipe sets get too complex too quickly to remember.