Geometric sizing
Betting the same fraction of the pot on every street so the last bet puts the stacks in exactly.
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- What it means
- A geometric plan uses one pot fraction for every remaining street, sized so the stacks are all in by the river if each bet is called.
- How it is calculated
- Each called bet of f times the pot multiplies the pot by (1 + 2f). With n streets and a stack-to-pot ratio of SPR, f = ((1 + 2 × SPR)^(1/n) − 1) ÷ 2.
- Worked example
- The flop pot is 10bb with 130bb behind, an SPR of 13. Over three streets f = (27^(1/3) − 1) ÷ 2 = 1, a pot-sized bet each time: 10, then 30, then 90. With 35bb behind, an SPR of 3.5, f is 50%.
- Why it matters
- It gets the most money in against a range that calls every street, so strong hands and polarized ranges size this way. It also shows when only an overbet can get the stacks in.
Try it: Poker math, Bet sizing against a capped range
Formula and worked example: Geometric bet sizing in poker math
Lessons that teach it: The same fraction of the pot on every street, When the stack plan needs an overbet · lessons other than the free one need an invite
See also: Stack-to-pot ratio, Overbet, Bet sizing