Betting Odds Calculator

Fractional Odds11/8
Decimal Odds2.38
Implied Probability42.11%
£10 Profit£13.75

11/8 means that for every £8 you stake, you win £11 in profit if the bet wins. Your stake is returned on top of that, so a £8 bet at 11/8 returns £19 total.

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The implied probability is 42.11%. This means the bookmaker prices this outcome as having roughly a 42.11 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 11/8 Odds

Stake Profit Total Return
£1.00 £1.38 £2.38
£5.00 £6.88 £11.88
£10.00 £13.75 £23.75
£20.00 £27.50 £47.50
£50.00 £68.75 £118.75
£100.00 £137.50 £237.50

Odds Conversion

Format Value
Fractional 11/8
Decimal 2.38
American +138
Implied Probability 42.11%

How the Calculation Works

Winnings: Stake x (11 / 8) = Profit. So £10 x (11 / 8) = £13.75 profit.

Probability: 8 / (11 + 8) = 8 / 19 = 42.11%.

Decimal odds: (11 / 8) + 1 = 2.38. 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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