Betting Odds Calculator

Fractional Odds9/4
Decimal Odds3.25
Implied Probability30.77%
£10 Profit£22.50

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

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The implied probability is 30.77%. This means the bookmaker prices this outcome as having roughly a 30.77 in 100 chance of happening.

These are odds against – the potential profit is greater than your stake. The higher the first number relative to the second, the less likely the bookmaker thinks the outcome is.

Winnings Table for 9/4 Odds

Stake Profit Total Return
£1.00 £2.25 £3.25
£5.00 £11.25 £16.25
£10.00 £22.50 £32.50
£20.00 £45.00 £65.00
£50.00 £112.50 £162.50
£100.00 £225.00 £325.00

Odds Conversion

Format Value
Fractional 9/4
Decimal 3.25
American +225
Implied Probability 30.77%

How the Calculation Works

Winnings: Stake x (9 / 4) = Profit. So £10 x (9 / 4) = £22.50 profit.

Probability: 4 / (9 + 4) = 4 / 13 = 30.77%.

Decimal odds: (9 / 4) + 1 = 3.25. 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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