Poker Fold Equity Calculator
Calculates the expected value of a bluff by combining your opponent's fold frequency, your pot equity when called, and bet size. Use it to decide whether a semi-bluff or pure bluff is profitable.
About this calculator
Fold equity is the portion of a bet's value derived from forcing your opponent to fold. The full expected value (EV) of a bluff combines two scenarios: the times your opponent folds and the times they call. The formula used here is: EV = (foldFrequency% × potSize) + ((1 − foldFrequency%) × (equityWhenCalled% × (potSize + bluffSize) − bluffSize)). When your opponent folds, you win the pot outright. When called, your remaining equity in the pot determines whether you profit or lose. A position factor (1 for in position, slightly less for out of position) scales the result because acting last improves realised equity. Breakeven fold frequency is the minimum fold rate needed for a bluff to show zero EV.
How to use
Pot = $100, bluff size = $60, opponent folds 55% of the time, your equity when called = 30%, position factor = 1. Step 1 — fold scenario: 0.55 × $100 = $55. Step 2 — call scenario: 0.45 × (0.30 × $160 − $60) = 0.45 × ($48 − $60) = 0.45 × (−$12) = −$5.40. Step 3 — total EV: $55 + (−$5.40) = $49.60 × 1 = $49.60. The bluff is highly profitable. Enter these values and the calculator confirms the EV instantly.
Frequently asked questions
What is fold equity in poker and why does it matter?
Fold equity is the added value a bet gains when it causes your opponent to fold hands that would otherwise beat you. Even a weak hand gains value if the opponent folds often enough. Understanding fold equity prevents you from only betting for value; it quantifies when aggression is mathematically justified. Without fold equity, bluffing with no showdown value is simply burning money.
How do I calculate the breakeven fold frequency for a bluff?
The breakeven fold frequency is: foldFrequency_BE = bluffSize / (potSize + bluffSize). For a $60 bet into a $100 pot, that is $60 / $160 = 37.5%. If your opponent folds more than 37.5% of the time, the bluff is immediately profitable even with zero equity when called. This ignores your equity when called, so accounting for that equity lowers the true breakeven point further.
When should I increase my bluff size to gain more fold equity?
Larger bets apply more pressure and increase fold frequency, but they also risk more when called. Increase your bluff size when the board texture heavily favours your perceived range, when your opponent is a fit-or-fold player, or when you have meaningful equity as a backup. On boards where your opponent has many strong hands they cannot fold, a smaller sizing preserves chips while still applying some pressure.