What does this calculator calculate?
The betting ROI calculator shows how much a strategy returned relative to the total amount staked. In plain terms: it answers whether, after all the entries in the period, you ended up above or below what you invested.
ROI in betting is the percentage of return obtained on the total amount staked. It measures financial results, not just hit rate.
Betting ROI formula
ROI = ((Total return - Total staked) รท Total staked) ร 100
- Total staked: sum of all stakes.
- Total return: the sum of what came back from winning bets.
- Profit/loss: total return minus total staked.
- ROI: the percentage result of the strategy in the analyzed sample.
Football betting example
Imagine you placed 20 bets on football matches, with $50 on each one. The total staked was $1,000. At the end of the period, your winning bets returned $1,120 in total.
| Metric | Value |
|---|
| Total staked | $1.000 |
| Total return | $1.120 |
| Profit | $120 |
| ROI | 12% |
That doesn't mean the next bet will win. It only means that, in that sample, the strategy had a positive return.
ROI is not the same as hit rate
| Metric | What it measures | Common mistake |
|---|
| Accuracy rate | How many bets won | Thinking that hitting more always leads to profit |
| ROI/Yield | Return relative to the total amount staked | Ignoring the size of the odds |
| Absolute profit | How much money is left over | Comparing strategies with different bankrolls |
In betting, hitting many bets isn't enough. A strategy can have a high hit rate and poor ROI if the odds are too low. It can also have a lower hit rate and positive ROI when it gets better odds.
Scope of this calculator
The calculator describes a set of bets, not an isolated bet. It allows you to compare periods, leagues, markets, or strategies.
- Comparing ROI by league.
- Compare ROI by market, such as 1x2, Double Chance, Over 2.5 goals, Both teams to score, and Over 9.5 corners.
- Assess whether EV+ bets are delivering returns over the long term.
- Compare conservative mode vs. value mode.
- Track whether the strategy remains consistent with the bankroll.
How Predora.si helps
Predora shows historical Return alongside sample size, hit rate, market, and league. Explore Performance and Return history to compare how the Active Model performed across different segments.
Common mistakes when measuring ROI in betting
Measuring ROI with few bets and drawing a definitive conclusion.
Looking only at hit rate.
Forgetting that low odds can destroy returns.
Mixing markets and leagues without separating the analysis.
Increasing stake to try to recover losses.
How to analyze football markets
After measuring ROI and yield, compare that reading with probability, odds, EV, market, and base. Less guesswork, more data-driven analysis.
Explore Predora.siFAQ
What is ROI in betting?
ROI in betting is the percentage of financial return on the total amount staked in a sample.
Are ROI and yield the same thing?
In practice, both usually measure the percentage profit or loss on the total amount staked.
How do I evaluate a strategy with positive ROI?
Compare the sample size, time period, odds, and staking assumptions. Review additional periods to assess how consistently the positive result appears.
What is a good ROI in sports betting?
It depends on the market, the odds, the volume, and the risk. The most important thing is to measure with a sufficient base and compare consistent samples.
Does a high hit rate mean a high ROI?
Not necessarily. If the odds are too low, a high hit rate can still generate poor returns.
Can I use ROI to compare football markets?
Yes, as long as you separate markets, leagues, and periods to avoid mixing samples with different risks.