Odds Calculator — Convert Between Probability and Odds Formats
Enter a probability or any odds format and instantly convert to all other formats — decimal, fractional, American/moneyline — plus the implied win probability.
Input format
%
Probability of the event occurring, implied by these odds
- 1
Convert % to decimal probability
40% ÷ 100 = 0,4 - 2
Implied probability (%)
0,4 × 100 = 40
Kako radi ovaj kalkulator?
All odds formats share the same implied probability. Decimal odds = 1/p; fractional = (1−p)/p; American: positive when underdog, negative when favourite. A 40% chance is decimal 2.50, fractional 3/2, American +150. Enter any format and all others are computed instantly.
Formula
How this is calculated
All odds formats express the same underlying probability; they differ only in how bookmakers and different markets quote it. Decimal odds (popular in Europe, Australia, and Canada) equal 1 / probability — so a 40% chance has decimal odds of 2.50, meaning a $1 stake returns $2.50 in total (including the stake back). Fractional odds (common in the UK and Ireland) express the net profit relative to the stake: 3/2 means you win $3 for every $2 staked, implying a probability of 2/(3+2) = 40%. American or moneyline odds use positive figures for underdogs and negative figures for favourites — +150 means a $100 stake earns $150 profit, giving an implied probability of 100/(150+100) = 40%; −200 means you stake $200 to earn $100 profit, giving 200/(200+100) ≈ 67%.
The "implied probability" is what the odds say the fair chance of the outcome is. In practice, bookmakers build in a margin (overround or vig) so the implied probabilities of all outcomes in an event sum to more than 100%, guaranteeing a long-run profit regardless of the result. This calculator converts pure (fair) odds with no margin applied, so the implied probabilities of opposing outcomes will sum to exactly 100%.
To go the other direction — from probability to odds — use decimal = 1/p; fractional = (1−p)/p; American: +((1−p)/p)×100 when p < 0.5 (underdog), −(p/(1−p))×100 when p ≥ 0.5 (favourite). For example, a 60% implied probability gives decimal 1.667, fractional 2/3, and American −150.
Često postavljana pitanja
Implied probability is the probability of an outcome that makes a bet break even at the given odds. For decimal odds of 2.50, implied probability = 1/2.50 = 40%. Bookmakers inflate implied probabilities above 100% across all outcomes in an event (the "overround") to lock in a guaranteed margin.
Positive American odds (e.g. +150) show how much profit a $100 stake wins — a +150 bet wins $150. Negative odds (e.g. −200) show how much you must stake to win $100 — you stake $200 to profit $100. Positive odds denote underdogs; negative odds denote favourites.
Decimal = (numerator ÷ denominator) + 1. For 3/2: (3 ÷ 2) + 1 = 2.50. The +1 accounts for the return of your stake — decimal odds represent the total payout per unit staked, not just the profit.
Poznato i kao
TG we-Calculate Editorial Team. (2026). Odds Calculator — Convert Between Probability and Odds Formats [Online calculator]. TG we-Calculate. https://we-calculate.com/hr/calculator/odds-calculator
TG we-Calculate Editorial Team. "Odds Calculator — Convert Between Probability and Odds Formats." TG we-Calculate. 2026. https://we-calculate.com/hr/calculator/odds-calculator.
TG we-Calculate Editorial Team, "Odds Calculator — Convert Between Probability and Odds Formats," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/hr/calculator/odds-calculator
@misc{wecalculate_odds_calculator, title = {Odds Calculator — Convert Between Probability and Odds Formats}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/hr/calculator/odds-calculator}}, year = {2026}, note = {TG we-Calculate} }
Je li vam ovaj kalkulator pomogao?