What is SPR?
Stack-to-Pot Ratio (SPR) is your effective stack divided by the pot size. It tells you how much money is at stake relative to what's already in the pot, which helps determine your commitment threshold.
Why SPR Matters
Lower SPR = easier decisions. With SPR of 2, you're essentially committed with any reasonable hand. High SPR requires stronger hands to justify stacking off.
Preflop Planning
Smart players manipulate SPR preflop. With AA, you want low SPR (3-bet to build pot). With 87s, you want high SPR (call to see cheap flop and potentially win big).
Quick Reference
SPR < 4: Top pair is good enough to stack off
SPR 4-10: Need overpair or better
SPR > 13: Sets and nutted hands only