Are you are just wanting to know how many links you will at least need to make sure the chain is long enough prior to sizing it.

I used a shimano 116 link 11 speed chain for my 11-32 52/36. That's probably more than needed. I don't remember how many links I took out of it. However it was more than adequate and a shorter chain might have worked. But if it's not long enough, buy another and get some links off it or see if an LBS has some matching links left over from one of their installs.

11 speed cassette should have an 11 speed chain.