The SPR & Commitment Visualizer
Calculate your Stack-to-Pot Ratio on the flop. Instantly know if you are mathematically committed to the pot or if you need a premium hand to play for your entire stack.
Understanding SPR
The Stack-to-Pot Ratio, or SPR, helps you understand the relationship between the pot size and the effective stack left behind. It is a useful postflop study concept because it shows how deep the hand is and how much room remains for future decisions.
Use this tool to study low, medium, and high SPR situations and learn how stack depth can affect hand strength, commitment pressure, and postflop planning.
SPR & Commitment Visualizer
Calculate the Stack-to-Pot Ratio on the flop and study how pot size and effective stacks affect commitment, hand strength, and postflop planning.
Why We Calculate SPR on the Flop
SPR is usually studied at the moment the flop is dealt, before any new flop bet is made. At that point, the pot size and effective stack give you a clear picture of how deep the hand is.
A low SPR means the pot is large compared to the remaining stacks. A high SPR means there is still more room for postflop decisions. Use SPR as a planning tool to understand stack depth, not as a final answer for every situation.
The Three SPR Zones
The result box translates your SPR number into a simple study category:
- Low SPR, 0 to 3: The pot is large compared to the remaining effective stack. Strong one-pair hands and overpairs often have more relative value, but the final decision still depends on the board, ranges, and action.
- Medium SPR, 3 to 6: There is more room for postflop decisions. Single-pair hands become more sensitive to board texture, position, opponent tendencies, and future betting.
- High SPR, 6+: Stacks are deep compared to the pot. Strong made hands, draws, position, and pot control become more important, because more chips can still go in on later streets.
How to Use This Tool Tool
Enter the pot size and the remaining stacks for both players. Use the same unit for all fields, either dollars or big blinds.
- Pot Size: Enter the amount in the pot when the flop is dealt, before any new flop bet.
- Your Stack and Opponent Stack: Enter the chips each player has left behind.
- Effective Stack: The tool uses the smaller of the two stacks, because that is the maximum amount that can go into the pot between the two players.
- SPR Number: The tool divides the effective stack by the pot size to show the Stack-to-Pot Ratio.
Important: SPR Is Not a Complete Strategy
SPR helps you understand stack depth and commitment pressure, but it does not make the decision by itself. Board texture, hand ranges, position, bet sizing, player tendencies, rake, and previous action all matter.
Use this tool as an off-table study reference to understand how pot size and stack depth affect postflop planning.