Enter your Total Amount Wagered and Total Amount Returned to calculate your Betting ROI — your net profit or loss as a percentage of money risked. You can also add individual bets by sport to track performance across NFL, NBA, MLB, NHL, and NCAAF. The results show your overall ROI percentage, net profit/loss, and a breakdown of your betting history.
Betting ROI
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Net Profit / Loss
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Total Wagered
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Total Returned
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Performance Level
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ROI (Return on Investment) in sports betting measures how much profit or loss you make relative to the total amount wagered. It is expressed as a percentage — a positive ROI means you are profitable, while a negative ROI means you have lost money overall. For example, a 5% ROI means you earned $5 profit for every $100 wagered.
Betting ROI is calculated using the formula: ROI (%) = ((Total Returned − Total Wagered) / Total Wagered) × 100. Subtract your total wagered from your total returned to get net profit or loss, then divide by the total wagered and multiply by 100 to get the percentage.
A good ROI for sports betting is generally considered to be anything above 0%, since you are at least breaking even. Professional bettors typically achieve ROIs between 3% and 10% over the long term. An ROI above 10% is considered excellent and is difficult to sustain consistently. Most recreational bettors have a negative ROI due to the bookmaker's margin (vig).
You need at least 100 bets to start seeing a statistically meaningful ROI figure. With fewer bets, short-term variance can make your ROI look much better or worse than your true long-term expectation. Serious bettors typically track 500 or more bets before drawing firm conclusions about their edge.
Yes, tracking ROI by sport (NFL, NBA, MLB, etc.) and bet type (spread, moneyline, totals) is highly recommended. You may have a positive edge in one sport while losing in another. Breaking down your data helps you identify where your strengths lie and where you should stop betting or adjust your strategy.
Improving your betting ROI involves shopping for the best odds across multiple sportsbooks, focusing on markets where you have genuine knowledge, using disciplined bankroll management, and avoiding emotional or chasing bets. Line shopping alone can add 1-3% to your ROI over time. Keeping detailed records also helps you identify and eliminate losing bet types.
Win rate is simply the percentage of bets you win, while ROI accounts for the actual amounts wagered and returned. You can have a high win rate but a negative ROI if your winning bets pay small amounts and your losing bets are large. ROI is a more complete measure of profitability because it factors in both frequency and size of wins and losses.
Your calculated ROI is based on real returns you actually received, so the bookmaker's margin is already built into your results. The vig means the theoretical break-even win rate is above 50% for standard -110 bets, which is why most bettors have a negative ROI in the long run. Overcoming the vig requires consistent skill or finding mispriced lines.