Poker SPR Calculator
Calculate Stack-to-Pot Ratio to optimize your postflop strategy
Poker SPR Calculator
Calculate stack-to-pot ratio for strategic decisions
Effective stack = the smaller of your stack or your opponent's stack (the maximum either can win)
Medium SPR
Stack-to-Pot Ratio: 8.0
SPR Zone
Recommended Strategy
Balanced play. Strong draws have value. Two pair+ is usually a stack-off.
SPR
8.0
Zone
Medium SPR
Commitment
55%+ equity
Pots Remaining
8.0
What This Means
✓ Stack Off With
Two pair+, strong draws with fold equity
⚠ Be Careful
One pair hands facing big bets
Try These Examples
Common SPR scenarios
SPR Zone Reference
Quick guide to stack-to-pot ratio zones
| Zone | SPR Range | Stack-Off Range | Key Strategy |
|---|---|---|---|
| Low | 1-4 | Top pair+ (TPGK+) | Commit light, draws bad |
| Medium | 5-10 | Two pair+ | Balanced, semi-bluffs ok |
| High | 11-20 | Sets+, nut draws | Set mine, position key |
| Deep | 20+ | Very strong hands only | Speculative, trap |
How SPR Affects Your Play
Understanding commitment levels
Example: SPR Planning
- 1. You have AA: Want low SPR to get stacks in easily
- 2. Preflop: $200 effective, blinds $1/$2
- 3. Standard raise: $6 → pot ~$15 → SPR ~13
- 4. 3-bet scenario: Raise $6, villain 3-bets to $20, you 4-bet to $50
- 5. Result: Pot ~$100, stacks $150 → SPR ~1.5
- 6. Now: Easy to get all-in with your premium hand!
Quick Answer
TL;DR summary
Stack-to-Pot Ratio (SPR) = Effective Stack ÷ Pot Size. It determines your commitment level and optimal strategy. Low SPR (1-4): Commit with top pair+, draws lose value. Medium SPR (5-10): Balanced play, two pair+ to stack off. High SPR (11-20): Set mining profitable, position crucial. Deep SPR (20+): Speculative hands gain value, avoid one-pair stacks. Example: $200 stack with $50 pot = SPR of 4 (low).
Key Facts About SPR
Important things to know
- SPR = Effective Stack ÷ Pot Size
- Low SPR (1-4): Stack-off with top pair, draws unprofitable
- Medium SPR (5-10): Need two pair or better to commit
- High SPR (11-20): Set mining becomes +EV, position matters
- Deep SPR (20+): Speculative hands gain value
- Example: $500 stack, $25 pot = SPR 20
- Effective stack = smaller of your stack or opponent's
- SPR helps determine postflop commitment decisions
Frequently Asked Questions
Common questions about poker SPR
What is SPR in poker?
SPR (Stack-to-Pot Ratio) is the ratio of effective stacks to the pot size. If you have $300 effective and the pot is $30, your SPR is 10. It determines how committed you should be to the pot and what hands are worth playing.
Why is SPR important?
SPR guides your postflop strategy. With low SPR, you should be willing to stack off with top pair because you're already pot-committed. With high SPR, you need stronger hands to stack off because you're risking more relative to the pot.
How does SPR affect drawing hands?
Low SPR hurts drawing hands. With SPR of 2, you can't win enough to justify drawing. High SPR helps draws because implied odds improve. With SPR of 20, flush draws become very profitable because you can win a lot when you hit.
What SPR should I target preflop?
Target low SPR with premium hands (AA, KK) to get stacks in easily. Target high SPR with speculative hands (small pairs, suited connectors) for better implied odds. Adjust raise sizes to manipulate SPR.
How do I calculate effective stack?
Effective stack is the smaller of your stack or your opponent's. If you have $500 and villain has $200, effective stack is $200 since that's the maximum either can win.