Fractional
UK & IrelandThe fraction is your profit for every unit you stake. Your stake comes back on top.
£5 at 2/1 → £10 profit · £15 back
Free tool
Bet calculator
Work out the return on anything from a single to a Goliath. Enter your odds, mark each result, and the numbers update as you go.
Your bet
Odds format
Selections
Selections
Odds converter
Type into any box and the others update.
Implied probability
—
How odds formats work
Bookmakers quote the same price in three formats. Implied probability turns that price into a chance, which helps when you are judging a bet.
Decimal
EuropeThe number is your total return for every unit you stake, with your stake already included.
£5 at 3.00 → £15 back · £10 profit
American
US · MoneylineA positive number is the profit on a 100 stake. A negative number is what you stake to make 100 profit.
£100 at 110 → £110 profit
£120 at −120 → £100 profit
Implied probability
ChanceThe chance of winning that a price suggests. Divide 1 by the decimal odds.
3/1 = 4.00 decimal → 1 ÷ 4 = 25% · one win in four