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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.

Next drill

Practice this as a decision, not a definition.

Use Preflop range trainer to turn the idea into spot reps, EV feedback, and a review cue you can repeat away from live play.

Open Preflop range trainer

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.

One-session loop

Turn the idea into one decision rep.

  1. Before the answer Calculate SPR for a single-raised pot, a three-bet pot, and a four-bet pot at 100 big blinds.
  2. After feedback Explain how top pair top kicker changes between SPR 2 and SPR 10.
  3. Next review Save one cue you can reuse in the next trainer session away from live play.

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. 1 Preflop range trainer Practice poker preflop ranges by position, stack depth, blockers, rake, three-bets, and repeated leak review instead of memorizing charts.
  2. 2 3-bet defense trainer Practice poker 3-bet defense decisions by position, open range, sizing, blockers, stack depth, and equity realization.
  3. 3 Poker equity trainer Practice poker equity, pot odds, call/fold thresholds, range equity, and equity realization with review prompts for adults 18+.