Round Robin Calculator

Updated Jul 15, 2026 By Jehan Wadia

Introduction

A round robin bet lets you take a group of picks and split them into smaller parlays. Instead of putting all your games into one big parlay, you break them into many small ones. This way, you can still win money even if one or two picks lose. Our round robin calculator does all the hard math for you. Enter your games, set your odds, and choose your parlay size. The tool will show you every parlay combination, your total risk, max payout, and profit or loss based on each game's result.

You can enter between 3 and 15 games using American or decimal odds. Pick a parlay size of 2 or more legs, and choose "Exactly" to build parlays of one size or "At Most" to include every size from 2 up to your chosen number. Mark each game as a win, loss, or push to see how your results change. The calculator gives you a full breakdown with a step-by-step solution, a chart, and a table of every single parlay.

How to Use Our Round Robin Calculator

Enter your games, odds, and stake to see every parlay combination in your round robin bet. The calculator shows your total risk, max payout, and profit or loss based on each game's result.

Stake Per Parlay — Type the dollar amount you want to bet on each individual parlay. This same stake applies to every parlay the round robin creates.

Number of Games — Pick how many games you want to include in your round robin. You can choose from 3 to 15 games.

Parlay Size — Choose how many legs each parlay will have. For example, picking 2 means every parlay pairs two of your games together.

Parlay Mode — Select "Exactly" to build parlays of only the size you chose. Select "At Most" to build every parlay from 2 legs up to the size you chose.

Odds Format — Pick "American" if you use odds like -110 or +150. Pick "Decimal" if you use odds like 1.91 or 2.50. If you need help converting between formats, try our betting odds calculator.

Odds — Type the odds for each game. Use the format that matches your chosen odds format.

Result — Set each game to Win, Loss, or Push. This lets you see how different outcomes change your payout.

Press the Calculate button to see your results. The calculator will show your total risk, max payout, max profit, and a full breakdown of every parlay. Press Reset Calculator to clear all fields and start over.

What Is a Round Robin Bet?

A round robin bet is a way to place multiple parlays at once using a group of games you pick. Instead of putting all your games into one big parlay, a round robin breaks them into smaller parlays of a set size. This means you can still win money even if one or two of your picks lose.

How Does a Round Robin Work?

Say you pick 4 games and choose a parlay size of 2. The round robin takes every possible pair from those 4 games and makes a separate 2-leg parlay out of each one. With 4 games and 2-leg parlays, you get 6 total parlays. Each parlay costs your stake amount, so your total risk is the stake multiplied by the number of parlays.

If one game loses, you only lose the parlays that included that game. The rest can still pay out. This gives you a safety net that a straight parlay does not.

Round Robin vs. Straight Parlay

A straight parlay puts all your picks into one bet. If even one game loses, you lose everything. A round robin costs more up front because you are placing many parlays, but it protects you from a single bad pick wiping out your entire bet. The trade-off is simple: you risk more total money for a better chance of getting something back. Use our parlay calculator to compare how a single straight parlay pays versus a round robin approach.

Key Terms to Know

Stake per parlay – The dollar amount you bet on each individual parlay in the round robin.
Parlay size – The number of legs (games) in each parlay. A 3-leg parlay needs all 3 games to win for it to pay out.
Total risk – Your stake multiplied by the total number of parlays. This is how much you put on the line.
Push – When a game ends in a tie or is canceled. That leg is removed from the parlay, and the remaining legs still count.

When Should You Use a Round Robin?

Round robin bets work best when you like several picks but do not feel confident enough to lock them all into one parlay. They are popular in football, basketball, and baseball betting. If you want more coverage and can handle a higher total cost, a round robin is a smart option to consider. You can also use a no vig calculator to find the true odds on each leg before building your round robin, or check an odds calculator to understand the implied probability behind each pick. Tracking your win rate over time will help you decide whether round robins or straight parlays work better for your betting style.

Formulas used

Total Parlays (Exactly mode)

\text{Total Parlays} = \binom{n}{k}

Total Parlays (At Most mode)

\text{Total Parlays} = \sum_{i=2}^{k} \binom{n}{i}

American to Decimal Odds (positive)

d = \frac{a}{100} + 1 \quad (a \ge 100)

American to Decimal Odds (negative)

d = \frac{100}{|a|} + 1 \quad (a \le -100)

Combined Parlay Odds

d_{\text{parlay}} = \prod_{i=1}^{k} d_i

Parlay Payout

\text{Payout} = \text{Stake} \times d_{\text{parlay}}

Total Risk

\text{Total Risk} = \text{Stake} \times \text{Total Parlays}

Profit / Loss

\text{Profit} = \text{Total Payout} - \text{Total Risk}

Frequently asked questions

How many parlays does a round robin create?

The number of parlays depends on how many games you pick and the parlay size you choose. The calculator uses a combination formula. For example, 5 games with 2-leg parlays creates 10 parlays. With 6 games and 3-leg parlays, you get 20. The calculator counts them for you and shows the math.

What happens if one game loses in a round robin?

Only the parlays that included that game lose. The rest of your parlays stay alive. This is the main benefit of a round robin over a single parlay. Set any game to "Loss" in the calculator to see exactly how it affects your total payout.

What does a push do in a round robin?

A push removes that leg from the parlay. The other legs in that parlay still count. If a 3-leg parlay has one push, it becomes a 2-leg parlay. If every leg in a parlay is a push, you get your stake back for that parlay.

What is the difference between Exactly and At Most mode?

"Exactly" builds parlays of only the size you pick. If you pick 3, every parlay has 3 legs. "At Most" builds parlays of every size from 2 up to the number you pick. So "At Most 3" gives you all 2-leg parlays plus all 3-leg parlays. This means more total parlays and a higher total risk.

How is total risk calculated?

Total risk is your stake per parlay multiplied by the number of parlays. If your stake is $5 and the round robin creates 10 parlays, your total risk is $50. The calculator shows this in the results.

Can I mix favorites and underdogs in a round robin?

Yes. You can enter any mix of odds for your games. Each game can have different odds, whether they are heavy favorites like -300 or big underdogs like +500. The calculator handles any valid odds.

What is the minimum number of games needed for a round robin?

You need at least 3 games. A round robin needs more games than the parlay size so it can create multiple parlay combinations. With only 2 games and 2-leg parlays, there would be just one parlay, which is just a regular parlay.

How do I switch between American and decimal odds?

Click the "American" or "Decimal" button under Odds Format. American odds look like -110 or +150. Decimal odds look like 1.91 or 2.50. When you switch, re-enter your odds in the new format.

Why is my round robin payout lower than a single parlay?

A single parlay combines all your games into one bet with one big payout. A round robin splits them into smaller parlays, so each individual parlay pays less. However, you have many parlays, and you can still profit even if a game loses. You trade a smaller max payout for more protection.

What does the situational profit or loss show?

It shows your actual profit or loss based on the results you set for each game. If you mark some games as wins and others as losses, the calculator adds up the payouts from winning parlays and subtracts your total risk to show your real outcome.

Is a round robin bet worth it?

It depends on your goals. A round robin costs more than a single parlay because you place many bets. But it gives you a safety net. If you feel good about most of your picks but not all of them, a round robin lets you still profit when one or two games lose. It is worth it when you value protection over maximum payout.

How do I read the parlay breakdown table?

Each row is one parlay in your round robin. The table shows which games are in that parlay, the combined odds, the payout if it wins, the profit, and the status. Green rows are wins, red rows are losses, and gray rows are pushes.

What is the maximum number of games I can add?

You can add up to 15 games. Keep in mind that more games with larger parlay sizes create a very large number of parlays. For example, 15 games with 7-leg parlays creates 6,435 parlays.

Does the stake apply to the whole round robin or each parlay?

The stake applies to each individual parlay. If you enter $1 and the round robin creates 6 parlays, your total cost is $6. The total risk shown in the results reflects this.

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