Betting Odds Calculator

Fractional Odds8/13
Decimal Odds1.62
Implied Probability61.9%
£10 Profit£6.15

8/13 means that for every £13 you stake, you win £8 in profit if the bet wins. Your stake is returned on top of that, so a £13 bet at 8/13 returns £21 total.

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The implied probability is 61.9%. This means the bookmaker prices this outcome as having roughly a 61.9 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 8/13 Odds

Stake Profit Total Return
£1.00 £0.62 £1.62
£5.00 £3.08 £8.08
£10.00 £6.15 £16.15
£20.00 £12.31 £32.31
£50.00 £30.77 £80.77
£100.00 £61.54 £161.54

Odds Conversion

Format Value
Fractional 8/13
Decimal 1.62
American -163
Implied Probability 61.9%

How the Calculation Works

Winnings: Stake x (8 / 13) = Profit. So £10 x (8 / 13) = £6.15 profit.

Probability: 13 / (8 + 13) = 13 / 21 = 61.9%.

Decimal odds: (8 / 13) + 1 = 1.62. 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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