Betting ROI Calculator
Measure betting performance by comparing net profit or loss with total stakes, then review return, average stake and average profit per bet.
Calculator inputs
How to use the betting ROI calculator
This calculator measures betting performance by comparing total profit or loss with the total amount staked. Enter total stakes, total returns and, optionally, the number of bets. The calculator shows ROI, net profit, total return, average stake and average profit per bet.
Total returns should include the original stake returned on winning bets. If you staked 100 and received 180 back, enter 180 as the return, not 80.
What is betting ROI?
Betting ROI is a percentage showing how efficiently total stakes produced profit or loss. A positive ROI means returns exceeded stakes, while a negative ROI means the sample lost money.
Performance percentage
ROI expresses profit or loss relative to total stakes.
Comparable metric
It allows different betting samples to be compared on the same percentage scale.
Not a risk measure
ROI does not describe drawdown, volatility or probability of ruin.
Betting ROI formula
Total returns − Total stakes(Net profit ÷ Total stakes) × 100If total stakes are 1,000 and total returns are 1,080, net profit is 80 and ROI is +8%.
Betting ROI versus yield
In betting discussions, ROI and yield are often used to mean the same calculation: profit divided by total stakes. Some analysts reserve ROI for bankroll-based performance and use yield for turnover-based performance, but most betting records use the terms interchangeably.
ROI versus net profit
Net profit is an absolute amount. ROI is a percentage. A strategy can make more money but have a lower ROI if it uses much more turnover.
| Sample | Total stakes | Net profit | ROI |
|---|---|---|---|
| A | 1,000 | 100 | 10% |
| B | 10,000 | 500 | 5% |
Sample B earns more absolute profit, but Sample A is more efficient relative to turnover.
Why sample size matters
A high ROI over ten bets can be caused by short-term variance. The same ROI over hundreds of independently recorded bets is more informative. Sample size does not guarantee that performance will continue, but it reduces the influence of a few unusual results.
- Track every bet, not only selected wins.
- Include void bets consistently according to your method.
- Record the actual price taken, not a later price.
- Separate strategies and markets before combining them.
- Review ROI together with drawdown and longest losing run.
Betting ROI examples
| Total stakes | Total returns | Net result | ROI | Interpretation |
|---|---|---|---|---|
| 1,000 | 1,080 | +80 | +8% | Profitable sample |
| 1,000 | 1,000 | 0 | 0% | Break-even |
| 1,000 | 920 | -80 | -8% | Losing sample |
| 5,000 | 5,250 | +250 | +5% | Profitable sample |
Example 1: positive ROI
Total stakes of €1,000 and total returns of €1,080 produce €80 profit and +8% ROI. Over 50 bets, the average stake is €20 and average profit per bet is €1.60.
Example 2: negative ROI
Total stakes of €2,000 and returns of €1,800 produce a €200 loss and -10% ROI.
Example 3: break-even performance
If returns equal stakes, net profit is zero and ROI is 0%. This does not necessarily mean the strategy was low risk; it only means the final sample ended at break-even.
ROI and variance
ROI can change sharply over short periods. One high-priced winner can transform a losing sample into a profitable one, while a losing streak can reduce a previously strong percentage. Review ROI over multiple time windows and avoid treating one month as proof of a permanent edge.
ROI for singles versus accumulators
Accumulators often create higher variance because several selections must win together. A single accumulator result can have a large effect on a small sample. Comparing ROI between singles and accumulators is more useful when each strategy is tracked separately.
ROI, strike rate and average odds
Strike rate alone does not measure profitability. A high strike rate at very short odds can still lose money, while a lower strike rate at larger prices can be profitable. ROI should be reviewed together with average odds, number of bets, stake size and market type.
Common betting ROI mistakes
- Entering profit instead of total returns. Returns must include returned stake.
- Excluding losing bets. Selective records make ROI meaningless.
- Mixing different time periods. Use consistent dates and settlement rules.
- Ignoring bonuses, fees or commission. Decide whether these are included and stay consistent.
- Judging a strategy from a tiny sample.
- Comparing ROI without comparing turnover.
- Assuming high ROI means low risk.
- Changing stake records after results are known.
Related performance and bankroll guides
Track performance consistently
ROI becomes useful only when every stake and return is recorded accurately. Explore the Academy for bankroll, variance and record-keeping guidance.
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Betting ROI Calculator FAQ
What is betting ROI?
Betting ROI is net profit divided by total stakes, multiplied by 100.
Are ROI and yield the same?
In betting they are often used similarly, although some analysts define them differently.
Should the original stake be included in returns?
Yes. Enter the full amount returned, including returned stake.
What does positive ROI mean?
It means total returns exceeded total stakes in the measured sample.
What does negative ROI mean?
It means the sample produced a net loss relative to total stakes.
What is break-even ROI?
Break-even ROI is 0%, where total returns equal total stakes.
Does ROI show risk?
No. ROI does not measure volatility, drawdown or probability of ruin.
How many bets are needed for reliable ROI?
There is no universal number, but larger and consistently recorded samples are more informative.
Can one large win distort ROI?
Yes. High-priced winners can have a large effect on small samples.
Should bonuses and commission be included?
Use a consistent rule. Include them if you want ROI to reflect actual account performance.
Can ROI compare different strategies?
Yes, but compare sample size, turnover, average odds and risk as well.
Is strike rate more important than ROI?
Strike rate and ROI measure different things. Profitability depends on both price and win rate.
Can accumulators have misleading ROI?
Small accumulator samples can be highly volatile, so separate tracking is recommended.
Is my data stored?
No. The calculation runs locally in your browser and requires no registration.
Does historical ROI predict future profit?
No. Historical ROI does not guarantee future performance.