Accumulator Calculator

Written by: Brian Webb
Fact checked by Alex Windsor  
Updated: June 18, 2024

Accumulators, parlays, or combo bets allow players to unify multiple wagers into one bet, significantly increasing the payout under the condition that all selections win.

The odds and potential earnings change when you bundle several selections together. To eliminate the guesswork from the equation, you can use Accumulator Calculator tools to instantly check how much cash you may win with your accumulator bets.

With our tool, you only need to choose the number of selections and fill out the fields with the odds for each event. This will save you the time of manually calculating your expected earnings and allows you to freely add or remove selections until you get an optimal wager.

Accumulator Betting Calculator
Odds Result Rule 4
Total Stake
Total Return
Total Profit

Using Our Free Acca Calculator

Our accumulator calculator tool can be divided into three sections.

The first allows you to input the main parameters of your wager, including togglable “each way” betting format, number of sports selections, and fold options.

The second part features two columns; in the “Outcome”, choose whether you’re betting on winners, losers, ties, or void, and in the “Odds” simply copy the odds from your chosen bookie.

The “Summary” will automatically calculate your estimated profits after you input your wager. You can choose to evenly distribute one wager across all selections (Total Combined Stake) or place the same wager on each selection (Stake Per Bet).

If you want to start from scratch, you don’t need to manually delete the odds, reformat the outcomes, or remove any selections. You can scrap the entire slip by simply tapping the “Reset Calculator” button located at the bottom of the tool.

Additionally, you can save your favourite accumulator wagers and share them with friends. All you have to do is simply select “Save This Bet Slip” and tap on your chosen social media platform.

Accumulator Bets Explained

An accumulator bet is a single wager made up of multiple individual bets. Unlike straight wagers where the bet wins if your selection wins, accumulator bets have one special rule – all included selections must be correctly predicted, or the entire wager will be lost.

Although accumulator rules vary from one bookmaker to another, you will always need to include at least two selections. They can be from the same event or an entirely different sports category. Note that most sites won’t allow you to include certain selections in accumulators, most notably futures or in-play matches.

Additionally, you can place bets on classic straights, spreads, or props, bet on the winning or the losing side, or if you’re bold, bet on a tie.

The more selections you include, the higher the risk, but the higher the potential reward will become.

The Formula Behind Accumulator Bets

Accumulator bets are calculated by multiplying the decimal odds of each selection on one end and then multiplying that result with your chosen wager.

To save you the trouble of converting American to Decimal odds, and vice versa, our tool can automate this process for you. Simply tap “Settings” in the top right corner, choose “Odds Format”, and select “American”, as shown below.

For reference, American odds of +100 are 2.0 in Decimal odds. Let’s illustrate how our calculator would work if you were to place $10 on an accumulator bet with odds of 2.0, 3.0, 3.5, and 4.0:

  • First, we multiply 2 x 3 x 3.5 x 4, resulting in 84;
  • We then multiply your wager of £10 by 84, resulting in £840.

How Our Accumulator Calculator Tool Can Help You

It is perfectly feasible to manually calculate the odds for any accumulator bet, regardless of how large it may be. However, you’d have to shift between multiple tabs, have a plain-old calculator handy, keep converting the odds into decimals, keep multiplying them as you bring additional selections, and backtrack whenever you make a mistake.

This tool exists to tackle these pain points instantly, allowing you to:

  • Seamlessly add or remove selections as you choose;
  • Transform the odds into American, Decimal, or Fractional format with a click;
  • Observe the changes in estimated payouts for smaller accumulators with the “Fold Options”
  • Instantly check your estimated profits as soon as you fill out the table

You can of course pair the calculator with any number of bookies free bet welcome offers that we have listed on the site. You may also want to bookmark and save our full list of betting calculators so you can come back and use them whenever you need to.

Accumulator Builder Terminology

  • Accumulator: sometimes referred to as a “multi-bet”, a type of bet consisting of multiple selections where each event must win.
  • Double: an accumulator bet with two selections.
  • Dead Heat: a term for a tie commonly used in racing sports.
  • Outlay: a total sum of wagers in accumulator bets.
  • Selection: a chosen outcome in a sports event.
  • Single: a single bet on an individual outcome.
  • Stake: the size of the bet.
  • Return: an estimated amount of money earned on the bet.
  • Treble: an accumulator bet with three selections.
  • Void bet: a postponed or cancelled selection, typically removed from accumulators (reducing the bet’s total cost and potential payout, but ensuring it is still active).

Brian is the owner of BettingTools, he has decades of experience in horse racing betting and the best ways to utilize betting tools and calculators. Brian’s vision is to provide a comprehensive resource for bettors, offering sophisticated tools combined with expert advice to enhance betting strategies. He has a passion for horse racing and soccer and a commitment to helping others gain knowledge and succeed in sports betting.