Probability Calculator
Use our Probability Calculator to determine the likelihood of single or multiple events. Input values for independent or dependent events. Suitable for students and statisticians. Receive instant results for binomial and conditional probabilities.
Probability Results
Decimal
0
Percentage
0%
Explanation
What is Probability?
Probability is a measure of the likelihood of an event occurring. It is expressed as a number between 0 (impossible) and 1 (certain), or as a percentage between 0% and 100%.
How Are Probabilities Calculated?
Different types of probability calculations: 1. Simple Probability = Favorable Outcomes ÷ Total Possible Outcomes 2. Compound Probability (Independent) = P(A) × P(B) 3. Complement Probability = 1 - P(A)
Common Applications
Statistics
Analyzing data and making predictions
Games
Calculating odds in games of chance
Risk Analysis
Evaluating business and project risks
Science
Predicting experimental outcomes
Tips for Probability Calculations
- Always express probabilities as decimals between 0 and 1
- For independent events, multiply individual probabilities
- Use complement probability for "not happening" scenarios
- Consider whether events are dependent or independent
