Free betting calculator
Expected Value Calculator
Enter the odds, your win probability and your bet size to see the expected profit or loss on the bet over the long run.
American odds, e.g. +150 or -110
Your estimate of the true chance
Expected value per bet
+$12.50
+12.50% of stake
- EV % of stake
- +12.50%
- Break-even probability
- 40.00%
- Implied by the odds
- Profit if it wins
- $150.00
How it works
Expected value weighs what you win when the bet lands against what you lose when it doesn't, using your probability for each. A positive number means the price is better than your estimate of the true odds; over many bets like it, that's profit.
The break-even probability is what the odds imply. You only have an edge when your win probability is above it.
EV = p × (decimal × stake − stake) − (1 − p) × stake
EV % = EV / stake × 100
break-even p = 1 / decimal
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Let the edge come to you
The Smart Lines prices every line against the sharpest market and lists the +EV bets worth taking, updated through the day.