Enter the number of times an event occurred and the number of times the experiment was performed to calculate the empirical probability.

## Empirical Probability Formula

The following formula is used to calculate an empirical probability.

EP = #O / #E

- Where EP is the empirical probability
- #O is the number of times an event occurred
- #E is the number of times the experiment was performed

## Empirical Probability Definition

An empirical probability is the chance that an event occurs during a given empirical experiment.

## Empirical Probability Example

How to calculate empirical probability?

**First, determine the number of time the experiment is performed.**For this example we will say the experiment or test was performed 10 times.

**Next, determine the number of events.**Measure the number of positive or successful outcomes occurred during those 10 experiments. We will say that there were 5 events.

**Finally, calculate the empirical probability.**Using the formula we find the probability to be 5/10 = .5 = 50%.

## FAQ

**What is empirical probability?**

Empirical probability is just normal probability but applied to empirical situations, such as science experiments.