# SPR (Stack To Pot Ratio)

> Source: [SPR (Stack To Pot Ratio) in the Smarter.Poker Glossary](https://smarter.poker/glossary/spr)

## Definition
SPR, The Stack To Pot Ratio, Is The Effective Stack Divided By The Pot At The Start Of A Street, Usually The Flop. A Low SPR, Below About Three, Means Top Pair Is Often Worth Getting All In. A High SPR, Above Ten, Rewards Hands That Can Make The Nuts And Punishes One Pair Hands That Overcommit.

- **Category**: Math
- **Term Code**: `spr`
- **DefinedTermSet**: [Smarter.Poker Poker Glossary](https://smarter.poker/glossary)

## Related Poker Terms

- [Effective Stack](https://smarter.poker/glossary/effective-stack) ([Markdown](https://smarter.poker/glossary/effective-stack.md)): The Effective Stack Is The Smaller Of The Stacks Between Two Players In A Hand, Because Nobody Can Win Or Lose More Than That Amount From The Other. If One Player Has 300 Chips And The Other 80, The Effective Stack Is 80. Strategy Depends On Effective Stacks, Not The Size Of Either Player's Own Stack.
- [Implied Odds](https://smarter.poker/glossary/implied-odds) ([Markdown](https://smarter.poker/glossary/implied-odds.md)): Implied Odds Are The Chips You Expect To Win On Later Streets When Your Draw Completes, Beyond What Is Already In The Pot. They Justify Calling With Hands Such As Small Pairs Or Suited Connectors When The Immediate Pot Odds Are Too Thin, Provided Stacks Are Deep And The Opponent Will Pay Off When You Hit.
- [Value Bet](https://smarter.poker/glossary/value-bet) ([Markdown](https://smarter.poker/glossary/value-bet.md)): A Value Bet Is A Bet Made Because Worse Hands Will Call It Often Enough To Show A Profit. The Test Is Simple: If The Opponent Calls, Are You Ahead Of Most Of The Hands They Call With? Value Bets Pay For Bluffs In A Balanced Strategy, And Missing Them Costs More Money Than Most Players Realize.
- [Range](https://smarter.poker/glossary/range) ([Markdown](https://smarter.poker/glossary/range.md)): A Range Is The Full Set Of Hands A Player Could Hold In A Given Spot, Based On Their Position And Every Action So Far. Strong Players Think In Ranges Rather Than Single Hands, Because Opponents Act With Many Hands In The Same Way. Reading A Range Means Narrowing It Street By Street As New Actions Arrive.

## Related Strategy Lessons

- [3-Bet Sizing In Position And Out](https://smarter.poker/learn/3-bet-sizing) ([Markdown](https://smarter.poker/learn/3-bet-sizing.md)): A Common Guideline Is To Three Bet To About Three Times The Open When You Will Have Position After The Flop And About Four Times When You Will Not, Because The Player Out Of Position Needs A Bigger Pot To Make Up For Acting First.
- [Stack To Pot Ratio (SPR) Explained](https://smarter.poker/learn/stack-to-pot-ratio) ([Markdown](https://smarter.poker/learn/stack-to-pot-ratio.md)): Stack To Pot Ratio Is The Effective Stack Behind Divided By The Pot On The Flop, And It Tells You How Committed A Hand Is: At 100 Big Blinds A Single Raised Pot Starts The Flop Near An SPR Of 17.7, A Three Bet Pot Near 5.6 And A Four Bet Pot Near 1.9.
- [How To Play In Straddle Games](https://smarter.poker/learn/straddle-games) ([Markdown](https://smarter.poker/learn/straddle-games.md)): A Straddle Is A Voluntary Blind Raise Before The Cards Are Dealt, Usually Twice The Big Blind, And It Makes Every Stack Effectively Shallower: 100 Big Blinds Facing A 2 Big Blind Straddle Is Only 50 Straddles Deep.

## Practice On Smarter.Poker

- [Multiway Poker Odds Calculator](https://smarter.poker/tools/poker-odds-calculator): Free Hold'em And Omaha Hand Versus Hand Equity Calculator.
- [Tournament ICM Calculator](https://smarter.poker/tools/icm-calculator): Free Malmuth-Harville Final Table And Bubble Equity Calculator.
- [Equity And ICM Calculators Guide](https://smarter.poker/features/poker-equity-calculators): Feature Specification For Multiway Equity And ICM Calculators.
- [GTO Training](https://smarter.poker/hub/training): Scenario Based Poker Training, Free To Play.

## Compliance & Fair Play

There Is No Real-Money Gambling On Smarter.Poker: Club Chips Are Play Credits With No Cash Value, And Diamonds Are A Promotional Rewards Currency.