Probability Calculator

Calculate probabilities for various scenarios.

Basic Probability

P(A) = Favorable Outcomes / Total Outcomes

🎲 Dice Probability

🪙 Coin Flip

Probability Rules

P(A ∪ B) = P(A) + P(B) - P(A ∩ B) — Addition Rule
P(A ∩ B) = P(A) × P(B) — Multiplication Rule (independent)
P(A') = 1 - P(A) — Complement Rule

Use Shawon Calculators' free probability calculator to get instant, accurate results directly in your browser. No data is stored or transmitted — all calculations happen locally on your device for complete privacy.

Probability Calculator — Free Online Calculator

Calculate probability of events, combinations, permutations, and conditional probability. Free instant probability calculator. Part of our Math calculators collection, trusted by students, professionals, and everyday users worldwide.

100% Accurate Uses verified mathematical formulas
Completely Free No registration or payment needed
Private & Secure Data stays in your browser
Works Everywhere Desktop, tablet, and mobile

How to Use This Probability Calculator

1
Enter Values

Input your numbers into the calculator fields

2
Get Results

Results are calculated instantly as you type

3
Use or Share

Copy results or use them for your needs

Why Choose Shawon Calculators?

🎯
Verified Accuracy

Uses standard mathematical formulas and algorithms verified against professional tools.

🔒
100% Private

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

💰
Completely Free

No hidden fees, no registration. 51+ calculators available for unlimited use.

📱
Any Device

Responsive design works perfectly on desktop, tablet, and mobile browsers.

Frequently Asked Questions

How do I calculate probability?

Probability = Number of favorable outcomes / Total number of possible outcomes. Enter your values and the calculator shows the result instantly.

What types of probability can I calculate?

Single event probability, combined probability (AND/OR), complementary probability, permutations, and combinations.

Is this calculator free?

Yes, 100% free with no registration.

Can I use it on my phone?

Yes, works on any device with a browser.

Who Uses This Probability Calculator?

👨‍💻 Students solving mathematical problems for homework and exams
📊 Teachers demonstrating mathematical concepts in class
🎓 Engineers performing quick calculations during project work
🏢 Researchers analyzing numerical data in scientific studies

About Shawon Calculators — Free Online Calculation Tools

Shawon Calculators provides 49+ free online calculators across financial, health, math, developer, date/time, and utility categories. Every calculator runs entirely in your browser — no data is sent to any server, ensuring your financial, health, and personal information stays completely private.

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From mortgage and loan calculators to BMI, calorie counters, and scientific calculators — our tools cover everyday math, finance, health, and development needs. All calculators provide instant results with no registration, no ads interrupting calculations, and no usage limits. Works on Chrome, Firefox, Safari, Edge, and all modern browsers on any device.