Expected Value Calculator

Calculate the expected value of a bet or decision from outcomes and probabilities.

Quick answer: Expected Value Calculator: Calculate the expected value of a bet or decision from outcomes and probabilities. Everything runs in your browser, so nothing you enter is uploaded or stored.

Outcome 1

Probability 1 (%)

Outcome 2

Probability 2 (%)

Outcome 3

Probability 3 (%)

How to use Expected Value Calculator

Enter your values in the fields.
The results update instantly as you type.
Note or copy the numbers you need.

Features

Instant results
Free, no signup
Runs in your browser, nothing is uploaded
Works on phone and desktop

Formula

EV = sum of (outcome x probability).

Worked example

Outcomes of 100, 20 and -30 at 20, 30 and 50 percent give an expected value of 11.

Frequently asked questions

What is expected value?

The average result if you repeat a decision many times: sum of outcome x probability.

Do the probabilities need to add to 100?

They should. The tool shows the total.

Is the Expected Value Calculator free?

Yes. It is free, needs no signup and works on any device.