Decimal Odds Calculator — Payout, Profit & Implied Probability
Enter decimal odds (e.g. 2.50) and your stake to instantly see total payout, profit and the implied win probability the odds represent — essential for evaluating any bet.
Stake returned plus profit if the bet wins
- 1
Profit if win
100 × (2.5 − 1) = 150 - 2
Implied probability
1 ÷ 2.5 = 40 %The fair win chance embedded in these odds. - 3
Total payout
100 × 2.5 = 250
How does this calculator work?
Decimal odds = total payout per unit staked (stake included). Profit = Stake × (Odds − 1). Implied win probability = 1 ÷ Odds. At 2.50 odds with a £100 stake: payout £250, profit £150, implied probability 40%. Use to compare bets and spot value when your estimated probability exceeds the implied one.
Formula
How this is calculated
Decimal odds express the total return per unit staked, including the original stake. Odds of 2.50 mean a winning £1 bet returns £2.50 — a profit of £1.50. The formula is simple: Payout = Stake × Odds and Profit = Stake × (Odds − 1).
The implied probability is the fair win chance embedded in the odds: Probability = 1 ÷ Odds. At 2.50, the bookmaker implies a 40% chance of the outcome. In a fair market all implied probabilities across all outcomes sum to 100%; in practice they sum slightly above 100% (the overround or "vig"), which is the bookmaker's margin. This calculator shows the single-outcome implied probability — to detect overround you would need to sum probabilities across the full market.
Decimal odds are the standard in Europe, Australia and Canada. They are easier to compare and convert than fractional (UK) or moneyline (US) odds because the relationship to implied probability and payout is direct arithmetic with no edge cases.
Frequently asked questions
Subtract 1 from the decimal odds to get the profit fraction. Odds of 2.50 become 1.50/1, which simplifies to 3/2 in fractional notation. Multiply by your stake to get the profit.
It means the bookmaker's model assigns a 40% chance to that outcome. If you think the true probability is higher — say 50% — the bet has positive expected value for you. If you think it's lower, the bet is negative expected value.
No. Decimal odds must be greater than 1.00 because a return of 1.00× would mean no profit, and odds below 1.00 would mean the bookmaker takes your stake without paying you back. The minimum meaningful odds are just above 1.00 (near-certain favourites).
Also known as
TG we-Calculate Editorial Team. (2026). Decimal Odds Calculator — Payout, Profit & Implied Probability [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/decimal-odds-calculator
TG we-Calculate Editorial Team. "Decimal Odds Calculator — Payout, Profit & Implied Probability." TG we-Calculate. 2026. https://we-calculate.com/calculator/decimal-odds-calculator.
TG we-Calculate Editorial Team, "Decimal Odds Calculator — Payout, Profit & Implied Probability," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/decimal-odds-calculator
@misc{wecalculate_decimal_odds_calculator, title = {Decimal Odds Calculator — Payout, Profit & Implied Probability}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/decimal-odds-calculator}}, year = {2026}, note = {TG we-Calculate} }
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