||The size of the call where the expected earnings and loss are equal.
This is the call that makes sense from an economical or mathematical point of view.
||Select the phase (i.e. Turn or River), enter your Outs (e.g. 9 Outs for a Flush Draw or 8 for an Open End Straight)
and the current size of the pot.
||The size of the Break Even Call is of course of no relevance, if you win the hand anyway.
E.g. if you have the nuts! In this case, the number of Outs will most probably be low (you don't have to improve your hand).
Therefore the Odds decrease and thus also the size of the Break Even Call.