Sports betting calculator – Betting odds and parlay

Odds format

Your bet

$
Total amount you are betting.
Selections
  1. Dec. — Frac. — US — Prob. —
Enter each price however you like: decimal (2.50), fractional (3/2) or American (+150). It is converted to the other formats automatically. One selection is a single bet; two or more make an accumulator: the odds are multiplied and every selection must win.
%
How likely you think the bet is to win. This is your own assessment, not a StaTips prediction.

Results

Total return —
Net profit —
Bet type
—
Number of selections
0
Odds entered
—
Total stake
—
Implied probability
—

Bet value

Enter your estimated probability to find out whether the bet has value.

How it is calculated
Total return
Stake × total odds. It includes the amount you staked.
Net profit
Total return − stake.
Combined odds
The decimal odds of every selection multiplied together (odds 1 × odds 2 × …). Every selection must win for the accumulator to pay out.
Implied probability
1 ÷ decimal odds. Odds of 2.50 imply a 40% chance.
Converting odds
Decimal = 1 + fractional. American = +(decimal − 1) × 100 when the odds are 2.00 or higher, and −100 ÷ (decimal − 1) when they are lower.
Expected value (EV)
Estimated probability × odds − 1. It is what you would win or lose on average per unit staked if you placed this bet many times. A positive EV means the bet has value.
Fair odds
1 ÷ your estimated probability. If the bookmaker offers higher odds, the bet has value.

Results are for guidance only. Please gamble responsibly. 18+


Want to calculate your potential winnings, compare odds, or find out whether a bet could offer value? The StaTips betting odds calculator gives you the numbers you need in one place. Enter your stake, choose your odds format, and see your potential return, net profit, implied probability, and expected value.

Whether you're placing a single bet or combining several selections in an accumulator, this bet calculator helps you understand the maths behind your bets before making a decision. You can also compare the odds offered by a bookmaker with your own estimate of an outcome's probability to assess whether the price represents potential value.

How to Use the Betting Calculator

Using our betting calculator is straightforward. Enter your details, adjust the selections, and let the tool do the calculations for you.

Choose your odds format. Use decimal, fractional, or American odds, depending on how your bookmaker displays them.

Enter your stake. Add the amount you want to bet.

Add your selection or selections. Calculate a single bet or combine multiple outcomes to estimate the return on an accumulator.

Check the results. Review your potential total return, net profit, implied probability, and other available metrics.

Estimate the value of your bet. Enter your own probability estimate to calculate the expected value and fair odds.

The calculator updates the figures based on your inputs, making it easier to compare different scenarios without working through the formulas manually.

What Can You Calculate with a Sports Betting Calculator?

A sports betting calculator can do more than show how much a winning bet might pay. Understanding the relationship between odds, probability, and potential profit can help you evaluate different betting scenarios.

With the StaTips calculator, you can work out:

Potential total return: The amount you would receive if your bet wins, including your original stake.

Net profit: Your potential earnings after subtracting the stake.

Implied probability: The probability associated with the odds you enter.

Combined odds: The resulting odds when you combine several selections into an accumulator.

Expected value (EV): An estimate of the average profit or loss per bet over the long run, based on your probability estimate and the potential outcomes.

Fair odds: The odds corresponding to your estimated probability, before accounting for a bookmaker's margin.

These figures provide different perspectives on the same bet. A large potential payout, for example, does not automatically mean that a bet offers good value. The probability of the outcome matters just as much as the price.

Calculate Decimal, Fractional and American Odds

Bookmakers don't all display odds in the same format. Our bet odds calculator supports three common formats, allowing you to work with the prices you're used to seeing.

Decimal odds

Decimal odds are widely used in Europe and are particularly easy to calculate. Multiply your stake by the decimal odds to find the total return.

For example, a €20 bet at odds of 2.50 would produce a potential return of €50, including €30 in profit if the bet wins.

Fractional odds

Fractional odds express potential profit in relation to the stake. For example, odds of 3/1 mean that a winning €10 bet would generate €30 in profit, plus the original €10 stake.

American odds

American odds use positive and negative numbers. Positive odds show the potential profit from a €100 stake, while negative odds indicate how much you need to stake to make €100 in profit.

For example, odds of +200 would generate €200 in profit from a €100 winning bet. Odds of -150 mean you would need to stake €150 to make €100 in profit.

Switching between these formats makes it easier to compare prices across different bookmakers and understand what the odds actually mean.

Parlay Bet Calculator: Calculate Accumulators and Multiple Bets

Combining several selections into one bet can increase the potential payout, but it also means more outcomes need to go your way. Our parlay bet calculator helps you work out the combined odds and potential return of a multiple bet.

In a standard accumulator, the decimal odds of each selection are multiplied together to calculate the combined odds. You then multiply those combined odds by your stake to calculate the potential total return.

Imagine you place a €10 accumulator with three selections at the following decimal odds:

Selection 1: 1.80

Selection 2: 2.00

Selection 3: 1.50

The combined odds would be 5.40 (1.80 × 2.00 × 1.50). If all three selections win, your potential total return would be €54, including €44 in profit.

You can use the calculator to explore different combinations and see how adding or removing selections affects your potential return.

Remember that a higher combined payout comes with additional uncertainty. In a standard accumulator, all selections must win for the bet to pay out, subject to the bookmaker's settlement rules.

What Is Expected Value in Sports Betting?

Expected value (EV) estimates the average profit or loss you could expect per bet over many repetitions of the same scenario, assuming your probability estimates are accurate and the underlying conditions remain comparable.

Unlike potential profit, which tells you how much a winning bet could pay, expected value takes into account both the possible outcomes and their estimated probabilities.

For a simple bet with two outcomes, the expected value can be calculated as follows:

Expected value = (Probability of winning × Net profit if successful) − (Probability of losing × Stake)

Suppose you stake €10 at decimal odds of 2.50 and estimate that the outcome has a 45% chance of winning.

Potential profit if the bet wins: €15

Probability of winning: 45%

Probability of losing: 55%

Expected value: (0.45 × €15) − (0.55 × €10) = €1.25

The expected value is therefore +€1.25 per bet under these assumptions. This is a theoretical estimate, not a guarantee that you will make a profit on the individual bet.

The accuracy of the result depends heavily on your probability estimate. If your estimate is wrong, the calculated expected value may be misleading.

How to Calculate Implied Probability and Fair Odds

Implied probability is the probability associated with a set of betting odds. For decimal odds, the basic formula is:

Implied probability = (1 ÷ Decimal odds) × 100

For example, decimal odds of 2.00 correspond to an implied probability of 50%, while odds of 4.00 correspond to 25%.

These figures don't necessarily represent the true probability of an outcome. Bookmakers typically include a margin in their prices, meaning the implied probabilities across all outcomes in a market can add up to more than 100%.

Fair odds, on the other hand, are the odds corresponding to your own estimate of an outcome's probability, without a bookmaker's margin.

The formula is:

Fair odds = 1 ÷ Estimated probability

If you estimate that a team has a 40% chance of winning, its fair decimal odds would be 2.50 (1 ÷ 0.40).

Comparing fair odds with the price offered by a bookmaker can help you assess whether a bet may offer value. However, this comparison is only as reliable as your estimate of the underlying probability.

Frequently Asked Questions

What is a betting odds calculator?

A betting odds calculator is a tool that calculates potential returns and profit based on your stake and the odds of a selection. Depending on its features, it can also calculate implied probability, convert odds formats, combine selections, and estimate expected value.

Is a bet calculator the same as a betting calculator?

The terms are generally used interchangeably. Both refer to tools that help you calculate potential betting returns. Some also include advanced features such as odds conversion, accumulator calculations, and expected value analysis.

How do I calculate potential winnings from a bet?

With decimal odds, multiply your stake by the odds to calculate your potential total return. Subtract your stake from that figure to find your potential profit. For example, a €20 bet at odds of 1.90 would return €38 in total, including €18 in profit if successful.

Can I use a parlay bet calculator for football accumulators?

Yes. A parlay bet calculator can be used to calculate potential returns from football accumulators and multiple bets in other sports. Enter the odds for each selection and your stake to work out the combined odds and potential payout.

What is the difference between potential profit and expected value?

Potential profit is the amount you would earn if a bet wins, excluding your original stake. Expected value takes into account the probabilities of the possible outcomes to estimate the average profit or loss per bet over the long run.

How do I know if a bet offers value?

A bet may offer value when the odds available are higher than the fair odds implied by your own probability estimate. However, the comparison depends on the accuracy of that estimate. Neither expected value nor implied probability guarantees a particular result.

Are the results from a sports betting calculator guaranteed?

No. The calculator provides mathematical estimates based on the odds, stake, and other inputs you supply. Actual results depend on the outcome of the event and the bookmaker's settlement rules. Expected value calculations are also dependent on the accuracy of your probability estimates.