Convert 1 to 21 Odds to Probability

1 to 21 Odds means that there are 1 chances of one outcome and 21 chances of a different outcome.

We will call these different outcomes A and B. Thus, there are 1 A's and 21 B's in 1 to 21 Odds.

1 to 21 Odds can be written as a ratio of 1/21. Instead of a ratio, Probability shows the percent chance of the outcomes A and B.

The two formulas to convert Odds to Probabilities are as follows

(A/(A+B))*100 = A%
(B/(A+B))*100 = B%

When we plug the 1 to 21 Odds numbers into the formulas, we get:

(1/(1+21))*100 = 4.55%
(21/(1+21))*100 = 95.45%

Therefore, 1 to 21 Odds converts to the following Probabilities:

4.55% Probability of A

95.45% Probability of B

So instead of saying 1 to 21 Odds, you could say that there is a 4.55% Probability.

Odds To Probability Converter
Convert more Odds here.

Convert 1 to 22 Odds to Probability
Here is the next Odds on our list that we converted to Probability.