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Expected Value Calculator

Result

Calculated result 15 Based on the values entered.
↗ Math

Expected Value Calculator — free online calculator.

Formula

x1*p1+x2*p2
  • Expected Value Calculator calculates its result from Value 1, Probability 1, Value 2, Probability 2. It uses the formula x1*p1+x2*p2. Change any input to recalculate the result instantly.
  • The main inputs are Value 1, Probability 1, Value 2, Probability 2. Enter them in the units and format shown in the calculator.
  • Keep comparable quantities in compatible units whenever the formula combines or compares them.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Expected Value

Inputs
  • Value 1: 10
  • Probability 1: 0.5
  • Value 2: 20
  • Probability 2: 0.5

Using Value 1 = 10, Probability 1 = 0.5, Value 2 = 20, Probability 2 = 0.5, the calculated result is 15.

Sample result: Calculating…

Frequently asked questions

What does the Expected Value calculate?

Expected Value Calculator — free online calculator.

Which values should I enter?

Enter Value 1, Probability 1, Value 2, Probability 2 using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: x1*p1+x2*p2.

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 7, 2026