Probability Calculator

Probability Calculator by allows you to calculate the normal and conditional probability in a few clicks!

Single Probability Calculator
Number of possible outcomes
Number of events occurred
Multiple Event Probability Calculator
Number of possible outcomes
Number of events occurred in A
Number of events occurred in B

You don't have to follow any hard and fast rules to use our conditional probability calculator. The following steps will enable you to find the probability through our Experimental Probability Calculator.

  1. Click on the "Single" button for finding a single event probability or "Multiple" button if you want to find the probability of multiple events.
  2. Now, enter the number of possible outcomes in our Statistics Probability Calculator.
  3. Once you are done with that, enter the number of events that occurred.
  4. Boom! You will get the results of your calculation within a flash of an eye.

The traditional method of finding the probability of an event isn't an easy task. You might have gone through hectic calculations that took a lot of your time and effort in the past to find the probability. With the immense innovation in the technology, you can luckily find online calculators that can help you calculate probability within no time. There is no need to make any manual calculation anymore, as this online normal probability calculator performs all the working on your behalf.

Another significant thing about the probability calculator is that it can be used without paying anything to anyone. You can find an event's probability only with a few clicks on your device through an online probability calculator.

Probability is the chance of occurrence of something. You may have an idea that whenever you are not sure about anything, we mostly talk about the possibilities of occurrence of that event. This study of events, which is based on probability, is known as statistics.

The probability of getting a six on a dice or getting head while tossing a coin is a simple example of probability. You might have seen that the probability is a vital part of statistics.

The formula for finding the probability is

P(A) = No. of favorable Outcome / Total No. of favorable Outcome

You can also take it as, P(A) = n(E)/n(S)

P (A) = Probability of A

N (E) = number of favorable outcomes

N (S) = total number of events

Entering your values in the given formula will enable you to find the probability of an event. However, good calculation skills are needed in using the manual method of finding probability.

Single event probability calculation is a process in which we find the probability for a single event that can be occurred. Like, in the example of tossing a coin, whether it will be head or it will be a tail. The formula for finding the probability for a single event is as follows.

Probability Formula :
⇒ P(A) = n(A)/n(S)

P(event) = No. of times the event occur / No. of Trials

Here in this formula, you are required to enter the following values to find the probability of an event. However, it may take time and effort to perform this task. That's why the best solution to find the probability is the use of an online tool, which enables you to find the probability within no time.

The process of finding the probability of two events is not very much different from the previous method. You can calculate the probability of two events by using the multiplication rule. In the formula, you are supposed to multiply the probability of the first event with the second. The following example may assist you in understanding its working.

For instance, the chances of getting a home you applied for are 35%, and the odds of you getting the car you applied for are 65%. Now, we will find the probability of getting both the home and car.

First, you need to convert your percentages of the two events to decimals. So,

35% = .35.

65% = .65.

Now, multiply the values,

.35 x .65 = .2275 or 22.75 percent.

The probability of getting the home and the car is 22.75%.

You can also calculate the probability with our probability calculator for multiple events in a click!

Some elements can influence the probability of an event. These significant components are discussed below.


The events that are not affected by the change in any other event are known as independent events.


If an event can be affected by some other event, then it is called a dependent event.

Mutually Exclusive:

If two events cannot occur at the same time, they can be called mutually exclusive events. Like in tossing a coin, either you can get a head or a tail, but you can't get both at the same time.