Odds Calculator
Convert between different odds formats and probability percentages. Supports fractional odds, decimal odds, American odds, and odds ratios. Calculate implied probability and expected outcomes.
Odds from Probability:
Odds = P / (1 - P)
Probability from Odds:
P = Odds / (1 + Odds)
Odds Ratio:
Fractional odds: A:B means win $A for every $B bet
Odds = P / (1 - P)
Probability from Odds:
P = Odds / (1 + Odds)
Odds Ratio:
Fractional odds: A:B means win $A for every $B bet
Example: Probability = 0.75 (75%)
Odds = 0.75 / (1 - 0.75)
= 0.75 / 0.25
= 3
Expressed as 3:1 or 3/1
Means: Win $3 for every $1 bet
Odds = 0.75 / (1 - 0.75)
= 0.75 / 0.25
= 3
Expressed as 3:1 or 3/1
Means: Win $3 for every $1 bet
🔗 Related Calculators
📐 Formula
Odds from Probability:
Odds = P / (1 - P)
Probability from Odds:
P = Odds / (1 + Odds)
Odds Ratio:
Fractional odds: A:B means win $A for every $B bet
Odds = P / (1 - P)
Probability from Odds:
P = Odds / (1 + Odds)
Odds Ratio:
Fractional odds: A:B means win $A for every $B bet
📝 Example Calculation
Example: Probability = 0.75 (75%)
Odds = 0.75 / (1 - 0.75)
= 0.75 / 0.25
= 3
Expressed as 3:1 or 3/1
Means: Win $3 for every $1 bet
Odds = 0.75 / (1 - 0.75)
= 0.75 / 0.25
= 3
Expressed as 3:1 or 3/1
Means: Win $3 for every $1 bet