Calculator Tools

Probability Calculator

Probability, percent and odds from favorable and total outcomes.

Private when possible
No account required

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About this tool

Probability Calculator covers classic equally likely outcomes: dice, cards and simple chance problems.

How to use

Enter favorable outcomes.
Enter total outcomes.
Read probability and percent.
Check odds for:against.

Features

P = favorable/total
Percent
Odds string
Validation

Common use cases

Everyday planning
Study checks
Quick estimates

Supported formats

Privacy

This tool processes data in your browser. Content is not uploaded to our servers unless a feature explicitly requires a network request.

Frequently asked questions

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