League of Legends (LoL) Question: ranked

op.gg has a decent tool for predicting your placement rank.

Outside of that you have to take in account both your teammates'/enemies' ranks and your rank last season (being unranked counts as being Silver V/Bronze I in the previous season iirc), apart from your win/loss ratio.

if this is your first ranked season its b2-s5 i believe

Do you have any ranked last season?
Whats the average ranked of your teammates when you play ranked?
Is it your first time ranked ?

Its mostly predictions and you can't really calculate it exactly where you would be placed. It also affects your K/D , Your behaviour , etc.

Thats what I believed anyways.