Probability Calculator - Free Online Tool to Calculate Probability

Quickly calculate probability with our free Probability Calculator. Enter the number of possible outcomes and the number of events that occurred, then click Calculate. Instantly view how many events occurred and how many did not. Copy results individually with a click. A simple, accurate, and free probability tool for students, teachers, and professionals.

Result

No of possible event that occured
No of possible event that do not occured

Probability is the foundation of statistics, data analysis, and decision-making. Whether you’re a student solving math problems, a researcher analyzing data, or someone exploring chances in daily life, our Probability Calculator makes the process simple.

With just two inputs the number of possible outcomes and the number of events that occurred you can instantly calculate results and understand probabilities in a clear, user-friendly way.

💡 Pro Tip: If you’re studying percentages along with probability, our Percentage Calculator is a great companion to quickly convert outcomes into percent values.

How the Probability Calculator Works

Enter the Number of Possible Outcomes.
Enter the Number of Events that Occurred.
Click Calculate.

The tool instantly provides results in a user-friendly view:

Number of Possible Events that Occurred
Number of Possible Events that Did Not Occur

Each result can be copied individually using the copy icon for use in assignments, reports, or professional documents.

Why Use a Probability Calculator?

Saves Time: Quickly calculate outcomes without manual formulas.
Accuracy: Avoid calculation mistakes common in probability problems.
Educational Use: Perfect for students learning basic probability.
Professional Use: Useful in business forecasting, risk assessment, and data analysis.
Everyday Use: Understand the likelihood of events in daily decision-making.

Real-World Applications

Students & Teachers: Solve probability questions in school or college.
Researchers: Analyze experimental data for outcomes.
Business Analysts: Use probability to estimate risks and opportunities.
Everyday Scenarios: Calculate chances in games, predictions, or planning.

Related Online Calculators

The Probability Calculator is part of our Online Calculators suite. You may also find these helpful:

Solve discount savings with the Discount Calculator.
Calculate costs with tax using the Sales Tax Calculator.
Find percentages instantly with the Percentage Calculator.
Compute averages with the Average Calculator.
Discover your exact age with the Age Calculator.

Why Choose SEO Site Checker’s Probability Calculator?

Simple inputs: only outcomes and events required.
Instant results: clear breakdown of occurred vs not occurred events.
Copy functionality: one-click copy for each value.
Free forever: unlimited usage with no registration.
User-friendly interface: mobile and desktop ready.
Part of a complete suite of Online Calculators.

Frequently Asked Questions

Frequently Asked Questions (FAQs) is a list of common questions and answers provided to quickly address common concerns or inquiries.

What inputs are required for the Probability Calculator?

You need to enter the number of possible outcomes and the number of events that occurred.

What results will I get?

You’ll see the number of events that occurred and the number that did not.

Can I copy results?

Yes. Each result can be copied individually using the copy icon.

Is this tool free?

Yes. It’s completely free with unlimited usage.

Who can use this calculator?

Anyone, students, teachers, professionals, or anyone working with probabilities.