Win/Loss Calculator

Turn a win/loss record into profit, strike rate and ROI, and see the strike rate your average price actually required.

A win/loss record calculator turns your betting history into profit, strike rate and ROI, then compares your actual strike rate with the one your average price demanded in decimal odds.

What Is a Win/Loss Record?

A win/loss record only makes sense when its three numbers are read together: how often you won, at what average price, and what that outcome meant for your bank. Taken alone, each is misleading. A strike rate of 43.3% might sound healthy until you learn that an average price of 2.10 needed 47.6% to break even, turning what looked respectable into a losing record. The gap between those two percentages — 43.3% versus 47.6% — is the difference between a loss and break-even. An average price of 2.10 sounds modest until you realise that shorter prices like 1.90 demand even higher strike rates of 52.6%, while longer prices like 3.00 are satisfied with only 33.3%. Profit or loss is the only objective truth, but without understanding strike rate and average price it is impossible to know whether a loss was tactical — you had a run of bad luck — or strategic, meaning your selection method is flawed. Most bettors have a rough sense of how many bets they win, but very few track their average winning price or account for the strike rate that price actually demands. This gap between feeling like you are doing well and the numbers telling you otherwise is where this calculator earns its keep.

How a Win/Loss Record Is Calculated

The mechanics are straightforward but the implications are profound. Take your total wins and losses and multiply by your stake per bet to get your total outlay. Multiply the wins by stake by average price to get your total return. Profit is simply return minus outlay, and ROI is profit divided by outlay as a percentage. Strike rate is wins divided by total bets, expressed as a percentage. The break-even strike rate is one divided by your average price. That last number is the key to understanding a record. Every average price implies a strike rate you need to hit to simply return even money. For an average price of 2.10, you need 47.6% of your bets to win. For 1.90, you need 52.6%. For 2.40, you need 41.7%. For 3.00, you need 33.3%. When your actual strike rate exceeds the implied break-even rate, you are winning long-term. When it falls short, you are losing, no matter what it feels like in the moment. The calculator does these calculations instantly and puts all three numbers on the same screen so you can see whether your strike rate and average price align, or whether one is pulling against the other.

What the Calculator Shows You

Enter your wins, losses, stake and average odds, and the calculator returns five key figures. Total staked is how much money you have put at risk — this is your commitment and the baseline against which everything else is measured. Total returned is the cash that came back from the wins, and profit shows the net result after subtracting your original stake. Strike rate shows how often you won as a percentage. Break-even strike rate shows the percentage you needed to hit at your average price just to return even. Compare these last two directly — if your actual rate exceeds break-even, you are in profit; if it falls short, you are in loss. ROI expresses the profit as a percentage of turnover and is the figure that matters most for assessing whether your selection method has an edge. The calculator displays these figures clearly and updates when you mark selections as void, so the numbers always reflect what you actually risked and returned.

Worked Example

A season of 120 flat-stake bets at EUR 20 each, with 52 wins and 68 losses, at an average winning price of 2.10. Total staked is 120 bets at EUR 20 = EUR 2400.00. Total returned is 52 wins at EUR 20 at 2.10 = EUR 2184.00. That leaves a profit of EUR 2184.00 − EUR 2400.00 = −EUR 216.00, a loss. The strike rate is 52 wins from 120 bets = 43.3%. The break-even strike rate for 2.10 is 1 ÷ 2.10 = 47.6%. Here is the critical reading: a 43.3% strike rate looks respectable on paper, but the average price of 2.10 demanded 47.6% to simply break even. That gap of 4.3 percentage points — just six more winners from 120 bets — is the entire EUR 216 loss. The ROI is −EUR 216 ÷ EUR 2400.00 = −9.0%. This record was not losing because the strike rate was bad; it was losing because the strike rate was not good enough for the prices taken. This is the lesson the record teaches: no strike rate exists in isolation, and one that looks acceptable at first glance can hide a fundamental problem.

Your Record at Different Win Totals

Using the same framework of 120 EUR 20 bets at 2.10, this table shows how many more or fewer winners would have moved the record from loss to profit. Notice that moving from 52 to 58 winners — just six more wins from 120 bets — swings the record from a EUR 216 loss to a EUR 36.00 profit. This demonstrates why the calculator is useful: it shows how sensitive the record is to the strike rate, and how much better 48.3% is than 43.3% even though the difference is small.

Required Strike Rates by Average Price

The strike rate you need to break even depends entirely on the average price you take. Shorter prices like 1.90 demand higher strike rates (52.6%), while longer prices like 3.00 demand lower ones (33.3%). A strike rate of 43.3% looks different depending on which average price it was struck at. Against 1.90 it is losing. Against 2.10 it is losing. Against 2.40 it would be winning. Against 3.00 it would be winning. This is why the average price matters as much as the strike rate, and why comparing two bettors’ records requires knowing both numbers.

How Averages Hide Distribution

Averaging the odds conceals a great deal. A record built from a few long-priced winners behaves very differently from one built on steady medium prices, even when the average is identical. The average is a single number that obscures the spread and the mix. If you took five bets at 3.00 odds and returned 2,184.00, that tells a different story than if you took 120 bets at 2.10 and returned the same amount — the variance, the recovery potential, and the information about your method differ vastly. Flat staking is what makes any comparison fair in the first place; if you size your bets by confidence, the strike rate becomes almost meaningless because larger bets distort the mean. Void bets should be stripped out of both the wins count and the total rather than counted as losses, because they did not happen and distort both the strike rate and the ROI calculation. A sample of 120 bets is small enough that a swing of six winners either way flips this record’s entire conclusion — from the EUR 216 loss shown here to a small EUR 36.00 profit. This is why tracking matters over time: over many more bets, the role of luck shrinks and true edge emerges. From a small sample, resist drawing firm conclusions but track the numbers to give the method time to evidence itself beyond variance.

When a Win/Loss Record Matters

A clear, tracked win/loss record is the foundation of honest self-assessment. Many bettors have an intuitive sense of their performance but carry several biases: they overweight recent winning runs, forget losing bets faster than winning ones, and rarely calculate break-even rates. This calculator forces you to address all three numbers together. Use it at regular intervals — monthly, quarterly — to check whether your strike rate is where it needs to be. If it is above break-even, you are winning; if below, you are losing. If it is close to break-even (within a point or two), variance is still dominant and you need more bets to be confident. The record is most useful when you have a substantial sample of bets, because small samples mislead. Use it to test whether a change in method — different bookmakers, different markets, or different selection criteria — changes your strike rate or average price. And use it to separate skill from luck: a 53.3% strike rate means you are winning; a 38.3% strike rate means you are losing. But knowing which is which requires understanding what your average price demanded of you.

Common Mistakes

The most common error is judging a record on strike rate alone without checking what the odds demanded. A strike rate of 43.3% at average odds of 2.10 is losing, but the same 43.3% at average odds of 3.00 would be winning by a comfortable margin. Counting void bets as losses distorts both the strike rate and the ROI, making your record look worse than it was. Reading an average price as if every bet were struck at it is equally flawed — the average tells you nothing about the distribution, whether your wins came from a few long prices or many short ones. Drawing firm conclusions from a small sample like 120 bets, where luck still dominates, is premature; treat small-sample records as direction rather than proof.

The Three Numbers in a Record

Each figure in your record tells you something different, and each has limits to what it reveals.