Probability Calculator 🎲

Calculate probabilities for single & multiple events. Perfect for statistics, gaming, and decision-making scenarios.

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Probability Calculator 🎲

Calculate probabilities for single & multiple events. Great for statistics, gaming, and decision-making.

Calculate Probability

🎯 Probability Result
0.00
Fraction

0/1

Decimal

0.00

Percentage

0%

Formula: P(A) = Favorable / Total

Why Use Our Probability Calculator?

🧠 Multiple Probability Types

Calculate single events, multiple events, and binomial probabilities all in one place.

📊 Multiple Formats

Get results as fractions, decimals, and percentages for better understanding and application.

🎓 Educational Value

Perfect for students learning probability theory with clear formulas and explanations.

🎮 Gaming Applications

Calculate odds for games, dice rolls, and other gaming scenarios with precision.

💼 Business Decisions

Make informed business decisions by calculating probabilities of various outcomes.

🔒 Privacy Protected

All calculations happen in your browser. Your data never leaves your device.

How to Use the Probability Calculator

1
📋 Choose Probability Type

Select from Single Event, Multiple Events, or Binomial probability calculations using the tabs.

2
📝 Enter Your Values

Input the required values based on your selected probability type (outcomes, probabilities, trials, etc.).

3
🎯 Click Calculate

Press the "Calculate Probability" button to compute your results instantly.

4
📊 View Results

See your probability in multiple formats (fraction, decimal, percentage) along with the formula used.

Frequently Asked Questions

Probability is a measure of the likelihood that an event will occur. It ranges from 0 (impossible event) to 1 (certain event). For example, the probability of rolling a 3 on a fair six-sided die is 1/6 or approximately 0.167.

For single event probability, use the formula: P(A) = Number of favorable outcomes / Total number of possible outcomes. For example, to find the probability of drawing a heart from a deck of cards: P(Heart) = 13/52 = 1/4 = 0.25 = 25%.

Independent events don't affect each other (e.g., coin flips). Mutually exclusive events cannot happen at the same time (e.g., rolling a 1 and 6 on a single die). For independent events: P(A and B) = P(A) × P(B). For mutually exclusive: P(A or B) = P(A) + P(B).

Binomial probability calculates the probability of getting exactly k successes in n independent trials, each with success probability p. The formula is: P(X=k) = C(n,k) × p^k × (1-p)^(n-k), where C(n,k) is the combination formula.

Absolutely! All calculations are performed directly in your browser. No data is sent to any server or stored anywhere. Once you close the page, all information is gone. This ensures complete privacy and security for your probability calculations.