Dice Probability Calculator
Find the exact chance of a target sum with identical fair dice.
Open toolProbability Calculator
Find event probability from equally likely outcome counts. Whole counts only, with favorable outcomes no greater than the positive total.
Free to useNo sign-upRuns in your browser
Enter your details
Enter the inputs, then select Calculate result.
Your result
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Result will appear here
How Probability Calculator works
Find event probability from equally likely outcome counts.
Whole counts only, with favorable outcomes no greater than the positive total. This assumes every outcome is equally likely; no prediction from real-world data.
How to use Probability Calculator
Follow the labelled inputs.
Enter favorable equally likely outcomes
Replace the example with favorable equally likely outcomes. The field labels specify the expected format and units.
Input and settings
Check the remaining inputs
Set total equally likely outcomes. Whole counts only, with favorable outcomes no greater than the positive total.
Tool result
Run, review and save
Select Calculate result. Review the calculated result, then copy it or download the result text.
Review the details
Examples and uses for Probability Calculator
Check the supplied example
The starting example produces Probability: 0.3; Percent: 30%. Find event probability from equally likely outcome counts.
Use your own inputs
Read the labels for favorable equally likely outcomes and total equally likely outcomes. Whole counts only, with favorable outcomes no greater than the positive total.
Record a reviewed result
Copy the calculated result into your notes. Keep the formula and assumptions with it if someone else needs to reproduce the calculation.
How to read the result
Read the units and assumptions with the output.
Find event probability from equally likely outcome counts.
Whole counts only, with favorable outcomes no greater than the positive total. This assumes every outcome is equally likely; no prediction from real-world data.
Supported input and limits
Check the stated scope before you run it.
Whole counts only, with favorable outcomes no greater than the positive total. This assumes every outcome is equally likely; no prediction from real-world data.
The input stays in this browser. Copy result and Download save the same displayed text.
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Open toolProbability Calculator: common questions
Answers about using Probability Calculator and understanding its results.
Which inputs does this tool accept?
Whole counts only, with favorable outcomes no greater than the positive total. This assumes every outcome is equally likely; no prediction from real-world data.
Can I copy or download the result?
Yes. Copy result copies the displayed text, and Download saves the same result as a text file. Calculations run in your browser without an account.
Calculate result with your input
Check the calculated result, then copy or download it.