Amateur gamblers look at how much money they won today. Professional gamblers look at their ROI (Return on Investment) over thousands of bets.
ROI measures net profit relative to the amount staked. It describes your observed results, but does not by itself distinguish skill from luck. Our ROI Calculator helps you calculate that return from your betting turnover and payouts.
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How to Use the ROI Calculator
This tool works for any type of gambling, from Sports Betting (where it is often called “Yield”) to Poker or Crypto trading.
- Total Invested ($): Enter the total amount of money you have bet.
- Note: This is not your deposit amount. It is the sum of all stakes. If you bet $10 five times, your “Invested” amount is $50.
- Total Returned ($): Enter the total amount returned to your account (Stakes + Winnings).
- Analyze the Result:
- Net Profit: The actual cash value you have gained or lost.
- ROI (%): Your observed return per dollar staked. A positive value records a profit; a negative value records a loss over the measured sample.
Example: The Reality Check
Let’s say you had a busy weekend betting on the Premier League.
- You placed 20 bets of $50 each.
- Total Invested (Turnover): $1,000.
You won some, you lost some. At the end of the weekend, your account balance shows returns of $1,050.
- Net Profit: +$50.
- ROI Calculation: $50 / $1,000 = 5.00%.
An observed ROI of 5% means you earned $5 per $100 staked in this sample. An ROI of -5% means you lost $5 per $100 staked. Twenty bets are not enough on their own to establish that either rate reflects your long-term expectation.
To examine uncertainty around your recorded results, use the ROI Confidence Interval Calculator. Interpret the interval under the tool’s sampling assumptions; a positive point estimate alone does not prove a profitable long-term strategy.
Turnover-based ROI is not the same as monthly bankroll growth. Growth also depends on how much of the bankroll you stake and how often. Our Compound Interest Calculator illustrates compounding under an assumed periodic growth rate, but that rate should not be copied directly from betting yield.
Frequently Asked Questions (FAQ)
What is a “good” ROI in sports betting?
It depends on the market difficulty.
Professional Level: 3% to 7% over thousands of bets is considered elite.
High Roller: Even 1-2% is acceptable if the volume (turnover) is huge.
Warning: Anyone claiming an ROI of 20%+ long-term is likely lying or has a very small sample size.
What is the difference between ROI and Yield?
In finance, ROI is usually calculated on the starting Bankroll. In European sports betting, ROI (or Yield) is calculated on the Total Turnover (sum of all bets). This calculator uses the Turnover method, which is the standard for evaluating betting performance.
Can I have a positive ROI on Slots?
In the short term, yes (due to variance/luck). In the long term, absolutely not. Slots have a negative mathematical expectation (RTP < 100%), so your long-term ROI will always converge to the house edge (e.g., -4%).