Convert between UK fractional, decimal, and American odds for horse racing
Input odds in any format
Against odds
Quick-start with common scenarios
Important information for horse racing bettors
Common questions about horse racing odds
Fractional odds like 5/1 show profit relative to stake. At 5/1, you win $5 profit for every $1 staked. "Evens" or 1/1 means equal profit to stake. Odds like 4/6 (less than 1/1) indicate a favorite where you risk more than you win.
Divide the first number by the second and add 1. For 5/1: (5 / 1) + 1 = 6.00 decimal. For 4/6: (4 / 6) + 1 = 1.67 decimal. The +1 accounts for getting your stake back.
American odds use +/- format. Positive odds (+200) show profit on $100 stake. Negative odds (-150) show stake needed to win $100. +200 means bet $100 to win $200 profit. -150 means bet $150 to win $100 profit.
Fractional odds are traditional in UK and Irish horse racing, dating back centuries. They clearly show the profit-to-stake ratio and are easy to calculate mentally. Many regular punters find them more intuitive than decimal format.
Odds-on refers to odds where the first number is smaller than the second (like 4/6, 1/2, or 1/3). These represent favorites where you risk more than your potential profit. At 1/2, you bet $2 to win $1 profit.