Parlay bets have higher potential payouts, but the risks are also higher than single wagers. That is why we recommend using the parlay calculator to see your chances of winning before placing such bets.
Thankfully, the parlay calculator is free and available not only on sportsbooks but on other sites like social sportsbooks. All you have to do is get your selections, load the calculator, and fill them in. We will show you how that is done, but most importantly, you’ll learn how best to use the calculator to improve your parlay betting strategies.
Explore the Most Reliable Parlay Betting Calculators This 2025
Quick facts about the parlay betting calculator
- This calculator determines potential winnings based on the number of bets, odds, and bet amounts.
- It is widely accessible and free to use.
- The calculator helps compare odds to find the best value for your parlay.
A brief look at how the parlay calculator works
This free parlay calculator works exactly the same as our moneyline calculator, but instead of a single bet outcome, you have to enter more than one selection.
Remember that a parlay bet or acca bet is any wager that includes multiple selections. For instance, you might place a parlay bet on both the Los Angeles Lakers and Boston Celtics to win their regular NBA season games on a Tuesday night.
The base calculator includes three options by default, but you can add additional betting options if you want to make more complex parlays. Please note that you have to enter the odds for each selection in the American Odds format i.e. -100 / 100. There is currently no facility to change to decimal, fractional, or other odds formats.
The sportsbooks listed on this page should give you the ability to change the odds though so if you use fractional or decimal, you can quickly change to American to get the relevant conversion.
The table below shows explains the three main odds types you should see at online sportsbooks:
| Odds Format | Description |
|---|---|
| Decimal | Main format used where the odds are shown as a decimal number greater than 1, i.e. 1.50 |
| American | Mainly used in North America where the odds are shown as a positive or negative number. |
| Fractional | Often used in Europe and the UK, the odds are shown as a fraction such as 2/5. |
Getting started with the free parlay calculator
Like other betting calculators, this sports betting parlay calculator is incredibly easy to use and if you make any mistakes you can always hit the rest button to remove any numbers you entered. To use it, simply follow the steps outlined below:
- Get your odds from your preferred sportsbook.
- Add the relevant number of bet selection boxes in the calculator.
- Enter the American odds for each selection.
- Enter the amount you want to wager.
- Click the Calculate button.
At this point, you can experiment with other odds and bet amounts to see how the final expected win varies. This approach will help you decide which sportsbook gives the best odds for the parlay bet. It is one of our recommended ways to use the parlay odds calculator, but ensure you enter the exact values so that you get the expected payout.
Get your parlays in at these top betting sites
The best ways to use our parlay calculator
Here are a few tips to get the best out of the parlay calculator:
📉 Note the Implied Probability
This value will decrease as you add more bets to your parlay. Take note of it also when adding different odds. For reference, implied probably in relation to sports bets means the theoretical percentage that a wager has of winning. Please note that this is only implied, not guaranteed. Implied probability is calculated based on the odds which the sportsbooks set.
🧮 Use it with Other Betting Calculators
For this tip, one of the best calculators you can combine it with is the Kelly Criterion calculator. This variant will calculate the optimal bet size to minimize risk and maximize long-term growth. It is a key tool in money management during sports betting.
⚖️ Compare Odds from Different Sportsbooks
For the same games and events, you can try odds from different sportsbooks to see how they affect the implied probability and the expected win. Use this approach to get the best odds before placing your parlay bet.
Pros and cons of our sports betting parlay calculator
The following are the advantages and disadvantages of using the parlay calculator:
Improve your strategies today with the help of our parlay calculator
A parlay calculator like the one featured here is an essential tool to have in your arsenal to help create effective sports betting strategies. It can help you look at the viability of your parlay bets, compare odds between sportsbooks, and see how the implied odds stack up with your betting research.
This calculator, or any of the other calculators on this site could be used at the recommended sportsbooks we have linked on this page. If you want to give one of them a try, just click the banners and get signed up.
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FAQs
💰 Which bets can I include in the parlay wager?
📱 Can I use the parlay calculator on mobile?
⚖️ Which odds can the parlay calculator handle?
Simon Day
Simon has been writing about Gaming and Sports for over a decade, with his work featured in a variety of well-known gaming magazines. This year, he joined win.gg as an Editorial Specialist, where he continues to share his passion for the industry through insightful and well-crafted content pieces.
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