Poker strategy guide · 5 min
Stack-to-pot ratio
Stack-to-pot ratio compares the effective stack to the pot. It tells you how many betting streets remain and how committed one-pair or draw-heavy hands should become.
What to know
Stack-to-pot ratio, or SPR, is effective stack divided by the pot. Low SPR makes commitment decisions simpler for strong one-pair hands and big draws; high SPR rewards nutted, disguised, and positionally advantaged hands that can win across multiple streets.
When to use this guide
- You know the spot type but want a cleaner reason for the decision.
- You want practice prompts before opening a trainer session.
- You need related concepts to review after a missed hand.
Low SPR simplifies commitment
When the remaining stack is small relative to the pot, strong one-pair hands and big draws can often continue aggressively because future decisions are limited.
High SPR rewards nutted equity
Deep stacks make reverse implied odds more important. Hands that can make the nuts or apply pressure over multiple streets gain value, while dominated one-pair hands become more fragile.
SPR starts preflop
Three-bets, four-bets, and squeeze sizes define the postflop SPR before the flop arrives. Studying postflop spots without noticing the preflop pot size misses a major driver of strategy.
Practice prompts
- Calculate SPR for a single-raised pot, a three-bet pot, and a four-bet pot at 100 big blinds.
- Explain how top pair top kicker changes between SPR 2 and SPR 10.
- Choose a preflop size that creates a postflop SPR suited to your value range.
Common questions
How do you calculate stack-to-pot ratio?
Divide the effective remaining stack by the current pot. If 600 is behind and the pot is 200, the SPR is 3.
Why does SPR matter in poker?
SPR shows how many betting streets remain and whether hands like top pair, overpairs, draws, or sets can profitably play for stacks.
Next study path
After this page, use the related guides below to connect the concept to a decision you can practice.
- 1 Preflop ranges Learn how position, stack depth, rake, and table configuration shape disciplined poker preflop ranges.
- 2 3-bet defense Build a practical poker 3-bet defense plan around position, blockers, equity realization, and stack depth.
- 3 Pot odds and equity A practical guide to converting poker bet sizes into break-even equity and better call/fold decisions.