Probability Calculator
Calculate the probability of an event as a percentage and odds.
Result
Results are estimates for general information only and are not professional advice.
Probability
Probability measures how likely an event is, from 0 (impossible) to 1 (certain). It equals favorable outcomes divided by total outcomes. This calculator shows the result as a fraction, decimal, percentage and odds.
Frequently Asked Questions
What is the Probability Calculator?
Calculate the probability of an event as a percentage and odds. It runs instantly in your browser and is completely free.
Is the Probability Calculator free and does it require signup?
Yes. Every calculator on Calculatis is 100% free with no registration, and the values you enter are never stored.
How accurate is the Probability Calculator?
It uses standard, widely-accepted formulas. Results are reliable estimates for general use and are not a substitute for professional advice.