Decimal Odds
Decimal odds — used everywhere outside the US and the UK high street — express your total return per £1 staked, including your original stake. Odds of 2.50 mean a £10 winning bet returns £25 (£15 profit plus your £10 stake).
Converting between odds formats
Decimal to implied probability: probability = 1 ÷ decimal odds. So 2.50 implies 40%.
Decimal to fractional: fractional = decimal − 1. So 2.50 = 6/4 = 3/2.
Decimal to American: for odds ≥ 2.00, American = (decimal − 1) × 100. For odds < 2.00, American = -100 ÷ (decimal − 1).
Format settings on Final3rd
Final3rd displays decimal odds by default but supports fractional and American formats in account settings. Internally, all model probabilities are stored in decimal-equivalent form.
Frequently asked questions
What does 1.50 odds mean?
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Decimal odds of 1.50 mean a £10 winning bet returns £15 (£5 profit plus £10 stake). The implied probability is 1 ÷ 1.50 = 66.7%.