Implied Probability & Value Calculator
Turn any bookmaker's odds into the true probability they imply, then put in your own estimate to see the expected value. Positive EV is the only thing that matters in the long run.
How value betting works
Implied probability is the chance the odds suggest: 1 ÷ decimal odds. Odds of 2.50 imply a 40% chance. That's the bookmaker's view of how likely the outcome is (with their margin baked in).
Your edge is the gap between what you think will happen and what the odds price in. If you reckon the true chance is 45% but the odds only imply 40%, you have a 5-point edge, and the bet is priced too generously.
Expected value (EV) turns that edge into money. It's the average profit you'd make per £1 staked if you placed the same bet over and over: EV = (your prob × (odds − 1)) − (1 − your prob). A positive number means the bet pays in the long run; a negative number means it bleeds money, however good it feels.
Why +EV is the only thing that matters. No single bet is "safe". Even an 80% shot loses one time in five. Over hundreds of bets, only positive expected value puts you ahead. Chase EV, not individual results, and never stake money you can't afford to lose.
Built by the team behind a publicly verified football model, every pick logged before kick-off, 68% hit rate, losses included.