Betting Odds Calculator

Fractional Odds4/9
Decimal Odds1.44
Implied Probability69.23%
£10 Profit£4.44

4/9 means that for every £9 you stake, you win £4 in profit if the bet wins. Your stake is returned on top of that, so a £9 bet at 4/9 returns £13 total.

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The implied probability is 69.23%. This means the bookmaker prices this outcome as having roughly a 69.23 in 100 chance of happening.

These are odds on – your stake is greater than the potential profit. The bookmaker considers this outcome more likely than not.

Winnings Table for 4/9 Odds

Stake Profit Total Return
£1.00 £0.44 £1.44
£5.00 £2.22 £7.22
£10.00 £4.44 £14.44
£20.00 £8.89 £28.89
£50.00 £22.22 £72.22
£100.00 £44.44 £144.44

Odds Conversion

Format Value
Fractional 4/9
Decimal 1.44
American -225
Implied Probability 69.23%

How the Calculation Works

Winnings: Stake x (4 / 9) = Profit. So £10 x (4 / 9) = £4.44 profit.

Probability: 9 / (4 + 9) = 9 / 13 = 69.23%.

Decimal odds: (4 / 9) + 1 = 1.44. Multiply your stake by this to get the total return including your stake.

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Written & Reviewed by Matt K
Sports Betting Analyst at Winners Media

I have been covering the UK betting industry since 2007, testing sportsbooks across mobile and desktop. At TabletBetting, I review betting sites, compare odds and payment methods, and track new bookmaker launches. My focus is on the mobile experience - how apps perform under real conditions, not just what the marketing says.
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