Odds to probability calculator
See what a price really says before you stake: the chance it implies, the win rate it needs to break even, and how much margin the bookmaker has built into a market.
One price
Decimal (2.50), fractional (6/4) or American (+150) odds.
At 2.50, a selection has to win more than 40.0% of the time, over many bets, just to break even. If it loses, the whole ₦1,000 is lost.
A full market
Every outcome's price, to see the bookmaker's margin and fair chances.
| Outcome | Implied | Fair chance | Fair odds |
|---|---|---|---|
| Home | 47.6% | 45.4% | 2.20 |
| Draw | 29.4% | 28.1% | 3.56 |
| Away | 27.8% | 26.5% | 3.77 |
The implied chances add up to 104.8%. The extra 4.8% is the bookmaker's margin; dividing it out gives the market's fair view.
Reading the numbers
Implied chance is 1 divided by the decimal odds: 2.50 implies 40%. It is the price's break-even point, not a forecast, and every bookmaker market adds a margin on top of the real chances. A short price is a likely outcome, never a certain one.
The full explanation, with worked examples, is in football odds and implied probability, explained. For several selections at once, the bet builder multiplies the odds for you.
Before you bet
This calculator describes prices; it does not predict results or tell you to bet. Stake only money you can afford to lose, set your limits in advance, and never chase losses. You must be 18 or over and gambling where it is legal for you. Responsible gambling and support.