Betting Odds Calculator

Fractional Odds10/3
Decimal Odds4.33
Implied Probability23.08%
£10 Profit£33.33

10/3 means that for every £3 you stake, you win £10 in profit if the bet wins. Your stake is returned on top of that, so a £3 bet at 10/3 returns £13 total.

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The implied probability is 23.08%. This means the bookmaker prices this outcome as having roughly a 23.08 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 10/3 Odds

Stake Profit Total Return
£1.00 £3.33 £4.33
£5.00 £16.67 £21.67
£10.00 £33.33 £43.33
£20.00 £66.67 £86.67
£50.00 £166.67 £216.67
£100.00 £333.33 £433.33

Odds Conversion

Format Value
Fractional 10/3
Decimal 4.33
American +333
Implied Probability 23.08%

How the Calculation Works

Winnings: Stake x (10 / 3) = Profit. So £10 x (10 / 3) = £33.33 profit.

Probability: 3 / (10 + 3) = 3 / 13 = 23.08%.

Decimal odds: (10 / 3) + 1 = 4.33. 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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