Expected ValueKelly CriterionHold / VigNo-Vig OddsOdds ConverterImplied ProbabilityParlay PayoutParlay vs StraightsPick'emBankroll Growth

Implied Probability Calculator

What win rate do these odds require? Convert odds into the implied probability you'd need to break even.

%

How to use:

1. Enter the odds from your sportsbook

2. See the implied probability (break-even win rate)

3. Enter your estimated fair probability

4. Positive edge = profitable bet over time

Break-Even Win Rate

52.4%

You need to win this often to break even at these odds

Positive Edge

+5.0% Edge

This bet has value at your estimated probability

Probability Comparison

Implied (Book)52.4%
Your Estimate55.0%

About the Implied Probability Calculator

Implied probability is the win rate the odds are pricing in. Every line at a sportsbook implies a probability — and that probability is also your breakeven win rate. If a -110 bet implies a 52.4% probability, you need to win at least 52.4% of those bets long-term to break even.

Once you can think in implied probability, comparing bets across odds and books becomes much faster. You stop asking 'is +150 a good number?' and start asking 'do I think this happens more than 40% of the time?'

Frequently asked questions

Is implied probability the same as my real win probability?
No. Implied probability is what the book is pricing in (including their margin). Your real win probability is what you actually estimate the chance of winning to be. The gap between them — if positive — is your edge.
How do I find the breakeven win rate for any bet?
Breakeven win rate equals the implied probability. If the odds imply 52.4%, you need to hit 52.4% of those bets to break even — anything above that is profit, anything below is loss.
Why is implied probability higher than the no-vig probability?
Implied probability includes the sportsbook's margin (vig). No-vig probability strips that margin out. The gap between them is roughly half the book's hold percentage on a balanced two-way market.

Other calculators

Parlay Calculator
Add legs, see the combined odds and payout. Works with American, decimal, or implied probability inputs.
Parlay vs Straights Calculator
Same legs, two strategies. See whether parlaying or straight-betting wins more bankroll long-term — and how the variance compares.
Pick'em Calculator
Pick'em / DFS contest math. See the breakeven hit rate per pick and whether your slip is +EV at the platform's payout multipliers.
Bankroll Growth Calculator
Project where your bankroll lands. Pick a stake strategy, edge, and number of bets — see the expected growth curve and variance.
View all betting calculators →