Free Poker Tool

Stop creating awkward river SPRs

Enter the pot, effective stack, street, target river SPR, and play profile. The planner solves the exact bet sizes that land on your chosen river geometry.

Exact River Target Flop + Turn Solver

Why your river gets awkward

Most players do not lose clean river decisions because they misread the hand. They lose them because earlier bet sizes built the wrong pot. Stack geometry is simply the relationship between your current pot, your remaining stack, and the river SPR you are trying to create.

Important: this tool is mathematically exact for bet-call lines with no raises. If a hand includes a raise or check-raise, the pot grows faster than this model and the river SPR will drop more sharply.

Stack Geometry Planner

Set the stage for your desired outfome

Quick Presets

Hand Details

Current Pot

14.0

Effective Stack

96.0

Current Street

Position

Position slightly changes how the line is distributed between flop and turn, while the final river target stays exact.

Target River Outcome

Play Profile

All numbers are exact for the selected river SPR target. No random heuristics are applied to the final result.

Recommended Line

Ready

Enter your numbers and calculate.

Pot and Stack Evolution

Line Comparison

Copy This Line

Quick usage notes

Jam target: river SPR 1.00 means your stack equals the pot on the river. That creates the cleanest natural shove.

Overbet target: river SPR 1.30 means a 130% pot shove is exactly available.

Impossible target warning: if your current SPR is already lower than the target you selected, no positive bet can increase SPR. In that case the tool correctly recommends checking or betting smaller than the model assumes.

FAQ

How can this tool help my poker bet sizing?

This tool helps you calculate exact flop and turn bet sizes so you can reach your target river SPR with a cleaner and more intentional betting line. It is useful for planning river jams, overbets, pot-control lines, and understanding how earlier street sizing shapes the final pot. You can also browse more free poker tools to improve your decision-making in different spots.

What is a good SPR for a river shove in poker?

A good SPR for a river shove is often around 1.00 when you want a clean pot-sized jam. That means your remaining stack matches the pot on the river. If you want a broader strategy explanation of stack-to-pot ratio, GTO Wizard has a useful stack-to-pot ratio guide, while this tool helps you calculate the exact line for your own spot.

What is SPR?

SPR stands for stack-to-pot ratio. It measures the relationship between the effective stack and the current pot, and helps you understand how committed you are and how much hand strength is usually needed to play for stacks.

Accuracy note: this solver assumes one bet and one call on each remaining street. If a raise, check-raise, or all-in happens before the river, the geometry changes immediately and the predicted river SPR no longer applies.

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Lorenzo

Adrian Lorenzo is a seasoned professional online poker player and one of the first poker agents with over 13 years of experience in the poker industry. Adrian has extensive experience playing at private poker clubs, as well as many Asian poker applications and agent-based poker networks. His reviews, comparisons, and analyses are all tested firsthand; therefore, he does not have sponsored content, nor does he provide any biased information.

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Stack Geometry Planner: Exact River SPR Calculator for Poker