Three Event Probability Calculator

Determining Probability

If you have a number of different scenarios percent chance of happening and want to see a deeper dive into how they all can occur, this calculator may be of use to you.

With our tool, you can see the following:

1. The percent chance all three events occur.
2. The percent chance that 2 or more of the events will occur.
3. The percent chance that 1 or more of the events will occur.
4. The percent chance that none of the 3 events will occur.

Knowing this information can be useful, so we hope this provides you with the more in-depth look that you were looking for.

Calculating Probability of Multiple Events

When you are calculating the probability of something happening, you only take into account its variables. When you are calculating the probability of three different events occurring, you now made the equation much more complex.

Calculating All 3 Events Occurring

If you wonder how we find the probability of all three events occurring, you are in the right spot. First, you divide the percentages of the events happening by 100 to get them in their proper form. Then, you multiply them all together. The result will then be multiplied by 100 and that is the percent chance they all occur.

Here is an example. Event 1 has a 50% chance of occurring, event 2 has a 40% chance, and event 3 has a 15% chance. The math involved is: (50 / 100) * (40 / 100) * (15 / 100), as a result you get .03. You multiply it by 100 to get a 3% chance of all three occurring.

Calculating None of the Events Occurring

Wondering how we calculated the percent chance that none of the three events happen? Here is how we did it. First, you divide the percentages of the events happening by 100 to get them in their proper form. Then, you do 1 - % for each event, then multiply the results together. The result will then be multiplied by 100 and that is the percent chance that none of them occur.

Here is an example. Event 1 has a 50% chance of occurring, event 2 has a 40% chance, and event 3 has a 15% chance. The math involved is: (1 - (50 / 100)) * (1 - (40 / 100)) * (1 - (15 / 100)), as a result you get .255. You multiply it by 100 to get a 25.5% chance of all three not happening.

How to Use the Three Event Probability Calculator

This is a very simple and easy to use calculator. The steps include:

1. Enter the percent chance of event 1 occurring. This number has to be 0 or more but 100 or less.
2. Enter the percent chance of event 2 occurring. This number has to be 0 or more but 100 or less.
3. Enter the percent chance of event 3 occurring. This number has to be 0 or more but 100 or less.
4. Hit calculate and get your results instantly!

In just a few seconds you will have a much more in-depth look at the set of events you are measuring and the odds they all occur or other situations happen.

Last Modified Date: July 22, 2024