Betting Odds Calculator

Fractional Odds1/4
Decimal Odds1.25
Implied Probability80%
£10 Profit£2.50

1/4 means that for every £4 you stake, you win £1 in profit if the bet wins. Your stake is returned on top of that, so a £4 bet at 1/4 returns £5 total.

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The implied probability is 80%. This means the bookmaker prices this outcome as having roughly a 80 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 1/4 Odds

Stake Profit Total Return
£1.00 £0.25 £1.25
£5.00 £1.25 £6.25
£10.00 £2.50 £12.50
£20.00 £5.00 £25.00
£50.00 £12.50 £62.50
£100.00 £25.00 £125.00

Odds Conversion

Format Value
Fractional 1/4
Decimal 1.25
American -400
Implied Probability 80%

How the Calculation Works

Winnings: Stake x (1 / 4) = Profit. So £10 x (1 / 4) = £2.50 profit.

Probability: 4 / (1 + 4) = 4 / 5 = 80%.

Decimal odds: (1 / 4) + 1 = 1.25. 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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