Free tool
Break-even win rate calculator
Enter the odds to see the win rate you need just to break even. Add your real hit rate, bet count, and stake and the calculator projects the profit that record returns over a season.
Break-even win rate
American, e.g. -110, +120
Optional — add your real hit rate to project a season:
Hit this just to break even at this price
Standard −110 juice needs 52.4% just to break even. Beating that number, not just winning more than half, is what turns a profit.
Why winning half isn't enough
At standard -110 juice you need to win 52.4% of your bets just to break even, not 50%. The extra 2.4 points is the vig. Knowing the break-even number for a price tells you the bar your handicapping actually has to clear, and it's always higher than even money on a juiced line.
From win rate to season profit
Your edge is the gap between your real hit rate and the break-even number. Feed in your win rate, how many bets you place, and your stake, and the tool turns that edge into a projected dollar profit and a per-bet ROI, so you can see what a small edge compounds to over a full season of volume.
Frequently asked
What win rate do I need to be profitable?
At -110, the standard price, you need to win more than 52.4% of your bets to profit. Longer prices need a lower win rate and shorter prices need a higher one. The calculator returns the exact break-even percentage for any odds you enter.
Is a 55% win rate good in sports betting?
Yes. Against standard -110 lines, 55% clears the 52.4% break-even bar by 2.6 points, which is a strong, sustainable edge. Over 500 bets at $100 that compounds into real profit, which is exactly what the season projection in this tool shows.
More tools
Implied probability →
Turn any American odds or a Kalshi/Polymarket price into the implied win probability, then compare it to your own estimate to find betting value.
Expected value →
Turn odds, your win probability, and stake into the expected value of a bet in dollars and percent.
Kelly criterion →
Find the mathematically optimal bet size from your edge and bankroll.