What does 21 to 18 odds mean?

"What does 21 to 18 odds mean?" Here we will tell you what 21 to 18 odds mean, what 21 to 18 probability means, and show you what a 21 to 18 odds payout would be.

21 to 18 odds
This means that out of 39 possible outcomes, odds are that there will be 21 of one kind of outcome and 18 of another kind of outcome.

For every 39, odds are that 21 will be a particular event and 18 will be another event.

21 to 18 probability
There is a 53.85 percent probability of a particular outcome and 46.15 percent probability of another outcome.

21 to 18 odds payout
If you bet 1 on a game with 21 to 18 odds and you win, your total payout will be 2.17 which is your bet plus 1.17 profit.

Odds vs. Probability
Note that odds and probability are not the same. Odds compare one event to another event, whereas probability compares one event to both possible events. Thus, when the odds are 21 to 18, the fraction for the Odds is 21/18, but the fraction to calculate the probability is 21/39.

Formulas and calculations used for 21 to 18 odds where A=21 and B=18

Odds
A / B =
21 / 18 =
21/18

Probability
A / (A + B) =
21 / (21 + 18) =
21/39 = 53.85%

Payout
((Bet*A)/B)) + Bet =
((1*21)/18)) + 1 =
2.17

Odds Calculator
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What does 21 to 19 odds mean?
Go here for the next odds on our list that we have interpreted.