Betting Odds Calculator

Fractional Odds2/7
Decimal Odds1.29
Implied Probability77.78%
£10 Profit£2.86

2/7 means that for every £7 you stake, you win £2 in profit if the bet wins. Your stake is returned on top of that, so a £7 bet at 2/7 returns £9 total.

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

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The implied probability is 77.78%. This means the bookmaker prices this outcome as having roughly a 77.78 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 2/7 Odds

Stake Profit Total Return
£1.00 £0.29 £1.29
£5.00 £1.43 £6.43
£10.00 £2.86 £12.86
£20.00 £5.71 £25.71
£50.00 £14.29 £64.29
£100.00 £28.57 £128.57

Odds Conversion

Format Value
Fractional 2/7
Decimal 1.29
American -350
Implied Probability 77.78%

How the Calculation Works

Winnings: Stake x (2 / 7) = Profit. So £10 x (2 / 7) = £2.86 profit.

Probability: 7 / (2 + 7) = 7 / 9 = 77.78%.

Decimal odds: (2 / 7) + 1 = 1.29. Multiply your stake by this to get the total return including your stake.

Similar Odds

  • 3/10 (decimal: 1.3, probability: 76.9%)
  • 1/4 (decimal: 1.25, probability: 80%)
  • 1/3 (decimal: 1.33, probability: 75%)
  • 2/9 (decimal: 1.22, probability: 81.8%)
  • 4/11 (decimal: 1.36, probability: 73.3%)

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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