Poker math

SPR in Poker — Formula, Examples & Quick Math

Also known as Stack-to-Pot Ratio

SPR is a math concept that turns gut decisions into +EV ones. Here's how to actually use it at the table.

Quick answer

SPR (Stack-to-Pot Ratio) — Effective stack divided by pot size on the flop.

In more detail

SPR < 4 → commitment territory (top pair often plays for stacks). SPR > 13 → deep, look for setup hands.

Try the tool
SPR calculator

Common questions

What does SPR mean in poker?

SPR < 4 → commitment territory (top pair often plays for stacks). SPR > 13 → deep, look for setup hands.

When should I use SPR in a hand?

SPR matters most when bet sizes and pot odds are close to your equity. In obvious folds and obvious calls, the math is just confirmation. Reserve mental effort for borderline spots.

What's the fastest way to calculate SPR at the table?

Use our SPR calculator — it runs entirely in your browser, free, no signup.

Related terms

Equity
Your statistical share of the pot, expressed as a winning probability.
EV
The average profit/loss of a play over infinite repetitions.
Implied Odds
Pot odds adjusted for expected future bets if you hit your draw.
Outs
Cards remaining in the deck that improve your hand to a winner.

New to poker? Start with our preflop strategy guide and the free TAG cheatsheet.