Stack-to-Pot Ratio (SPR) Calculator
Enter your effective stack and pot size to find your SPR, commitment zone, and strategy recommendation. For the full strategy behind each zone, including breakeven math, preflop sizing, and hand examples, see our guide on stack-to-pot ratio strategy in poker.
SPR Calculator
SPR = Effective Stack ÷ Pot Size
Strategy Recommendation
Enter your stack size and pot size to get strategic advice.
Important
How to Use the SPR Calculator
Type your remaining effective stack (the smaller stack in the hand) and the current pot size on the flop. The calculator returns your SPR, classifies it into a commitment zone (Low, Medium, or High), and gives a strategy recommendation.
Next Steps
Now that you know your SPR zone, put it to work:
- 1Check your implied odds. If SPR is high and you hold a drawing hand, plug it into our implied odds calculator to see whether calling is profitable across multiple streets.
- 2Run the equity matchup. Use our poker equity calculator to see if your hand clears the breakeven threshold for your SPR.
- 3Calculate your pot odds. Facing a bet? Our pot odds calculator shows the exact calling price you need to justify continuing.
FAQs
How do I calculate my stack-to-pot ratio?
Divide your effective stack (the smaller of the two stacks in the hand) by the pot size on the flop. Example: $180 remaining with a $43 pot gives you SPR 4.2. The calculator above does this instantly and classifies the result into a commitment zone.
What hands can I stack off with at different SPR levels?
At SPR 0 to 3, top pair and overpairs are generally strong enough to commit. At SPR 3 to 6, TPTK and overpairs commit on dry boards but need caution on wet textures. At SPR 6+, two pair or better is typically required. Our strategy guide on stack-to-pot ratio covers each zone in full detail with hand examples.
Does the SPR calculator work for PLO and tournaments?
The SPR formula is the same across all formats: effective stack divided by pot size. The commitment thresholds differ because PLO ranges are stronger (you need better hands to stack off at any given SPR) and tournament ICM pressure raises the cost of busting. The calculator gives you the ratio and zone; adjust your hand strength requirements based on format.