How this calculator works
For fractional odds A/B, decimal odds are 1 + A/B. Multiply decimal odds by your example stake to get the total winning return; subtract the stake to get profit. Raw implied probability is 100 divided by decimal odds. This calculation uses your price input, not live market data.
Example: 5/2 with a $2 stake
Decimal odds are 3.50. A winning return at that unchanged price is $7 total, including $5 profit and the original $2 stake. Raw implied probability is about 28.57%. A losing win bet loses the $2 stake. The initial values are an arithmetic demonstration, not a suggested wager.
What is not included
The result is not an official payoff. Final pari-mutuel odds can move, and breakage, dead heats, fees, taxes or other settlement adjustments are not modeled. This is a win-price calculator, not a place, show or exotic-payout calculator.
Implied probability is not model probability
Price alone does not tell you the true chance of winning. The raw implied figure here is also not GAMELIN's field-normalized market probability. Read the odds guide for that distinction, or use fair odds to explore an explicit probability assumption.
Sources and scope
Official references and GAMELIN's published evidence. Check current track and operator information before acting.