Definition
Fractional odds (British odds) display potential profit relative to stake as a fraction. The numerator shows profit, the denominator shows stake required. Common in UK betting, they're written as 5/1 (five-to-one) meaning $5 profit per $1 wagered. Less common in US sportsbooks but still used for futures.
Example
Odds of 5/1 mean a $100 bet returns $600 total ($500 profit + $100 stake). Odds of 1/4 mean you risk $400 to win $100. To convert to decimal: (5/1) + 1 = 6.00. To find implied probability: 1 / (5+1) = 16.67%.
Common Questions
How do I convert fractional to American odds?
How do I convert fractional to American odds?
For fractions > 1 (like 5/1): multiply by 100 = +500. For fractions < 1 (like 1/4): divide 100 by the fraction = -400. So 5/1 = +500 and 1/4 = -400.
Why are fractional odds less common in the US?
Why are fractional odds less common in the US?
American bettors prefer American odds (-110, +150) which directly show risk/reward. Fractional odds require mental math for payouts. However, you'll still see them on futures markets and at some international books.