Probability Calculator
Calculate basic probability, compound probability, and understand odds. Perfect for students, researchers, and professionals working with probability theory and statistics.
Probability Calculator
Calculate basic probability, compound probability, and understand odds
Choose Calculation Type
About Probability
• Probability ranges from 0 (impossible) to 1 (certain)
• Odds show the ratio of favorable to unfavorable outcomes
• Independent events don't affect each other's probability
• P(A and B) = P(A) × P(B) for independent events
Probability Examples
Understanding Probability
Probability is a measure of the likelihood that an event will occur. It ranges from 0 (impossible) to 1 (certain), and is fundamental to statistics, gambling, risk assessment, and many other fields.
Our calculator handles both basic probability (single events) and compound probability (multiple events). Basic probability calculates the chance of a specific outcome from a set of possible outcomes, while compound probability deals with the likelihood of multiple events occurring together.
The calculator also provides odds calculations, which are commonly used in gambling and sports betting to express the likelihood of an event occurring.
How to Use This Calculator
When to Use Probability
Games & Gambling
Calculate odds for card games, dice, lottery, and other games of chance.
Statistics & Research
Analyze experimental results and understand likelihood in data analysis.
Risk Assessment
Evaluate the likelihood of events in business, insurance, and safety planning.