Expected Value Calculator

The amount you put on the bet. Expected value and profit scale with it, so doubling the stake doubles both.

The bookmaker price in decimal format: the total return per unit staked. Odds of 2.10 return 2.10 (1.10 profit) for every 1 staked.

Your own estimate of how often this bet wins, in percent. The bet has positive EV when it beats the break-even probability 100 / odds.

Example: at odds 2.10 break-even is about 47.6%, so 50% shows a profit.