Probability Calculator

Calculate Probabilities

What are the odds? Our Probability Calculator helps you answer that question mathematically. Whether you need to find the chance of a single event, combined probabilities of multiple events, or conditional probabilities, this tool handles the calculations.

Understanding Probability

Probability ranges from 0 (impossible) to 1 (certain), often expressed as a percentage. Understanding probability helps you make better decisions when outcomes are uncertain, from games to business to everyday choices.

Common Calculations

Find the probability of independent events occurring together. Calculate the chance of at least one event happening. Determine conditional probabilities when events are related. Convert between probability, odds, and percentages.