Betting Odds Calculator

Fractional Odds3/10
Decimal Odds1.3
Implied Probability76.92%
£10 Profit£3.00

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

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The implied probability is 76.92%. This means the bookmaker prices this outcome as having roughly a 76.92 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 3/10 Odds

Stake Profit Total Return
£1.00 £0.30 £1.30
£5.00 £1.50 £6.50
£10.00 £3.00 £13.00
£20.00 £6.00 £26.00
£50.00 £15.00 £65.00
£100.00 £30.00 £130.00

Odds Conversion

Format Value
Fractional 3/10
Decimal 1.3
American -333
Implied Probability 76.92%

How the Calculation Works

Winnings: Stake x (3 / 10) = Profit. So £10 x (3 / 10) = £3.00 profit.

Probability: 10 / (3 + 10) = 10 / 13 = 76.92%.

Decimal odds: (3 / 10) + 1 = 1.3. 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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