Betting Odds Calculator

Fractional Odds2/9
Decimal Odds1.22
Implied Probability81.82%
£10 Profit£2.22

2/9 means that for every £9 you stake, you win £2 in profit if the bet wins. Your stake is returned on top of that, so a £9 bet at 2/9 returns £11 total.

Matt KWritten by: Matt K|Last Updated: April 15, 2026

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The implied probability is 81.82%. This means the bookmaker prices this outcome as having roughly a 81.82 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 2/9 Odds

Stake Profit Total Return
£1.00 £0.22 £1.22
£5.00 £1.11 £6.11
£10.00 £2.22 £12.22
£20.00 £4.44 £24.44
£50.00 £11.11 £61.11
£100.00 £22.22 £122.22

Odds Conversion

Format Value
Fractional 2/9
Decimal 1.22
American -450
Implied Probability 81.82%

How the Calculation Works

Winnings: Stake x (2 / 9) = Profit. So £10 x (2 / 9) = £2.22 profit.

Probability: 9 / (2 + 9) = 9 / 11 = 81.82%.

Decimal odds: (2 / 9) + 1 = 1.22. Multiply your stake by this to get the total return including your stake.

Similar Odds

  • 1/5 (decimal: 1.2, probability: 83.3%)
  • 1/4 (decimal: 1.25, probability: 80%)
  • 1/6 (decimal: 1.17, probability: 85.7%)
  • 2/7 (decimal: 1.29, probability: 77.8%)
  • 3/10 (decimal: 1.3, probability: 76.9%)

Back to Betting Odds Calculator – How Betting Odds Work

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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