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Open toolExpected Value Calculator
Calculate the probability-weighted expected value. Use 1–1,000 comma- or whitespace-separated numbers, each with magnitude at most 1 billion.
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Enter your details
Enter the inputs, then select Calculate.
Your result
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Result will appear here
How Expected Value Calculator works
Calculate the probability-weighted expected value.
Use 1–1,000 comma- or whitespace-separated numbers, each with magnitude at most 1 billion. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded. Probabilities must be between zero and one and sum to one within 10⁻⁹. No automatic normalization.
How to use Expected Value Calculator
Follow the labelled inputs.
Enter outcomes
Replace the example with outcomes. The field labels specify the expected format and units.
Input and settings
Check the remaining inputs
Set probabilities. Use 1–1,000 comma- or whitespace-separated numbers, each with magnitude at most 1 billion.
Tool result
Run, review and save
Select Calculate. Review the calculated result, then copy it or download the result text.
Review the details
Examples and uses for Expected Value Calculator
Check the supplied example
The starting example produces 17.5. Calculate the probability-weighted expected value.
Use your own inputs
Read the labels for outcomes and probabilities. Use 1–1,000 comma- or whitespace-separated numbers, each with magnitude at most 1 billion.
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.
Calculate the probability-weighted expected value.
Use 1–1,000 comma- or whitespace-separated numbers, each with magnitude at most 1 billion. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded. Probabilities must be between zero and one and sum to one within 10⁻⁹. No automatic normalization.
Supported input and limits
Check the stated scope before you run it.
Use 1–1,000 comma- or whitespace-separated numbers, each with magnitude at most 1 billion. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded. Probabilities must be between zero and one and sum to one within 10⁻⁹. No automatic normalization.
The input stays in this browser. Copy result and Download save the same displayed text.
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Open toolExpected Value Calculator: common questions
Answers about using Expected Value Calculator and understanding its results.
What assumptions and input limits apply?
Use 1–1,000 comma- or whitespace-separated numbers, each with magnitude at most 1 billion. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded. Probabilities must be between zero and one and sum to one within 10⁻⁹. No automatic normalization.
How can I save the output?
Use Copy result to copy the displayed text, or Download to save it as a text file. The tool runs in your browser and does not require an account.
Calculate with your input
Check the calculated result, then copy or download it.