Effective Stack Size Tutorial

What is Effective Stack Size?

Effective stack size is the smallest stack between players in a hand. It defines the maximum amount that can be won or lost.

Why is Effective Stack Size Important?

• Determines the maximum risk in a hand.
• Affects post-flop decision-making and betting strategies.
• Key to calculating Stack-to-Pot Ratio (SPR).

How to Calculate Effective Stack Size?

The effective stack size is the minimum stack among the active players in the hand.

Formula:

                Effective Stack = min(Hero Stack, Villain Stack)
            

Example Calculation

Player	Stack (BB)
Hero	100 BB
Villain	50 BB

The effective stack size here is 50 BB, as the Villain has the smallest stack.