Online Tool Store
Probability Calculator
Work out the chance of two events happening together or separately.
🔒 މި ޓޫލް ހިނގަނީ ހަމައެކަނި ތިޔަބޭފުޅާގެ ބްރައުޒަރގައި. ތިޔަބޭފުޅާގެ ފައިލްތައް ސަރވަރަކަށް ފޮނުވޭކަށް ނުވެ.
Math and statistics
Probability Calculator
Single event
Enter favorable outcomes out of all equally likely outcomes.
Probability
Decimal
Odds
Two events
- Not A
- Not B
- Both A and B
- A or B (or both)
- Exactly one
- Neither
Repeated independent tries
Find the chance of at least one success, no success, every success, or exactly `k` successes.
At least once
Never
Every try
Exactly k
How Probability Calculator works
- Open Probability Calculator and review the example state before entering your own values.
- Enter or select the information needed for Probability Calculator.
- Review the result and adjust the inputs if you want to compare another case.
Calculate a single event from favorable and total outcomes, combine independent or mutually exclusive events, and find repeated-trial chances including exactly k successes. Runs entirely in your browser. The interactive workspace runs in your browser, so you can review the result without creating an account.
FAQ
What is Probability Calculator used for?
Calculate a single event from favorable and total outcomes, combine independent or mutually exclusive events, and find repeated-trial chances including exactly k successes. Runs entirely in your browser.
Do I need an account?
No. The tool is available directly in the browser without an account or sign-up.
What should I do if the result looks unexpected?
Check the entered values and compare them with the guidance shown in Probability Calculator. Use the result as a planning aid and verify important decisions independently.