Prop Bet Calculator
Calculate EV, breakeven probability, and payout for player props, over/unders, and alt lines. Find where the value is hiding.
Odds format:
Bet Setup
$
%
Alt Line Comparison
Results
Enter over and under odds to see the EV analysis.
How to Use the Prop Bet Calculator
1
Enter the over and under odds from your sportsbook. The calculator removes the vig to find the true no-vig probability.
2
Select your bet side (Over or Under) and enter your stake to see exact payout and EV figures.
3
Enter your true probability estimate to calculate your edge. Positive EV means the bet is profitable long-term at your probability estimate.
4
Use the Alt Line Comparison table to compare multiple lines and find which has the best risk/reward for your probability estimate.
Props and alt lines carry high vig. Always verify your edge is real before betting. Positive EV doesn't guarantee profit in any single bet.
Take Your Edge Further
GAMB·8 gives you automated bot strategies, real-time analytics, poker HUD, and sports intelligence: all the tools to find and exploit +EV opportunities.