Probability calculator
Easily calculate probabilities with this probability calculator. Enter the number of favorable and possible outcomes and get the result immediately, including an explanation.
What is probability?
Probability theory, also known as probability calculus, is a branch of mathematics used to calculate the probability of a particular event occurring. The result is often expressed as a fraction, decimal, or percentage.
The formula for probability calculation
The basic formula for probability is:
probability = number of favorable outcomes / number of possible outcomes
How does this probability calculator work?
Enter the number of favorable outcomes and the total number of possible outcomes. The calculator automatically calculates the probability for you and displays the result as a fraction, decimal, and percentage.
Example of a probability calculation
Suppose you roll a die and want to know the probability of rolling a 6.
- Favorable outcomes: 1
- Possible outcomes: 6
chance = 1 / 6 ≈ 0.167 = 16.7%
When do you use probability?
- School and exam issues
- Games and dice
- Statistics and data analysis
- Risk assessments
- Scientific and economic models
Frequently Asked Questions
Can a chance be greater than 1?
No, a chance is always between 0 and 1, or between 0% and 100%.
What does a chance of 0 mean?
A chance of 0 means that an event is impossible.
Is this probability calculator free?
Yes, this tool is completely free and can be used without limits.