Probability Calculator
This Probability Calculator helps you determine the likelihood of an event occurring. Enter the number of favorable outcomes and total possible outcomes to calculate probability instantly.
Example: Probability of getting a specific number when rolling a die.
Probability
Fraction
—
Decimal
—
Percentage
—
What Is Probability?
Probability is a measure of how likely an event is to occur. It is expressed as a number between 0 and 1, where 0 means the event will not happen and 1 means the event will certainly happen.
Probability Formula
Probability is calculated using the formula:
P(Event) = Favorable Outcomes ÷ Total Outcomes
Where Probability Is Used
- Statistics and data analysis
- Games of chance and gambling
- Risk assessment and forecasting
- Science and research
Frequently Asked Questions
Probability always ranges between 0 and 1, or between 0% and 100%.
No. If probability is greater than 1, the input values are incorrect.
The probability becomes 1 (or 100%), meaning the event is certain.