Effective stack in poker: what it is and why it matters
The effective stack is the smaller of the stacks between you and an opponent. It’s the most you can win or lose against that player in the hand. If you have $200 and your opponent has $60, the effective stack is $60 — your extra $140 doesn’t matter in this hand.
How to find it
Section titled “How to find it”- Heads-up: compare your stack with your opponent’s and take the smaller.
- Multiway: the effective stack is different against each player. Look at the player you’re most likely to play the pot with.
- In tournaments, measure it in big blinds: 15bb effective is a push/fold spot, 100bb is deep play. See push/fold.
Why it matters
Section titled “Why it matters”| Decision | How the effective stack changes it |
|---|---|
| Set mining | You need deep effective stacks (about 20 times your call) |
| 3-betting | Short effective stacks → 3-bet all in or fold |
| Bluffing | You can only threaten what the opponent has left |
| Implied odds | Small effective stacks mean small implied odds |
See implied odds and set mining.
Examples
Section titled “Examples”- You hold 4-4 and face a $3 raise from a player with $30 left. The effective stack is only 10 times the call: fold, set mining doesn’t pay.
- You have 100bb, a short-stacked player with 20bb shoves. You’re deciding only about 20bb, so you can call a bit wider than against a deep stack.
Common mistakes
Section titled “Common mistakes”- Looking at your own big stack and ignoring that the opponent is short.
- Bluffing a player who has almost nothing left behind.
- Forgetting that stack depth also sets the SPR.
What is the effective stack in poker?
Section titled “What is the effective stack in poker?”The smaller of the two stacks between you and an opponent; it is the most either can win or lose in the hand.
Why does the effective stack matter?
Section titled “Why does the effective stack matter?”It decides implied odds, bluffing power and whether to play push/fold or deep.
How do I find the effective stack multiway?
Section titled “How do I find the effective stack multiway?”Compare your stack with each opponent separately; it can be different against each player.
Is my big stack an advantage against a short stack?
Section titled “Is my big stack an advantage against a short stack?”Not in a single hand: you can only win or lose the short stack’s amount.