Round Robin Calculator
Calculate parlay combinations from multiple selections
Formula:C(n,k) = n! / (k!(n-k)!)
Round Robin Settings
Configure your parlay structure
$
Your Selections
3 picks (min 2, max 10)
#1
#2
#3
Round Robin Results
3 picks in 2-team parlays
Parlays Created
3
Total Stake
$30
Max Payout
$109
Max Profit
$79
All Parlay Combinations
Parlay #13.64x
Team A + Team B
Payout: $36(+$26)
Parlay #23.64x
Team A + Team C
Payout: $36(+$26)
Parlay #33.64x
Team B + Team C
Payout: $36(+$26)
Win Scenario Analysis
| Wins | Net Profit/Loss | Status |
|---|---|---|
| 0 of 3 | -$30 | Loss |
| 1 of 3 | -$30 | Loss |
| 2 of 3 | +$6 | Profit |
| 3 of 3 | +$79 | Profit |
Summary: You're placing 3 separate 2-team parlays at $10 each, for a total stake of $30. You need at least 2 of 3 picks to win to break even.
Try These Examples
Common round robin configurations
Round Robin Bet Tracker
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Round Robin Reference
Number of parlays by configuration
| Picks | 2-Team | 3-Team | 4-Team | 5-Team |
|---|---|---|---|---|
| 3 picks | 3 | 1 | - | - |
| 4 picks | 6 | 4 | 1 | - |
| 5 picks | 10 | 10 | 5 | 1 |
| 6 picks | 15 | 20 | 15 | 6 |
| 7 picks | 21 | 35 | 35 | 21 |
| 8 picks | 28 | 56 | 70 | 56 |
Quick Answer
TL;DR summary
A round robin is multiple parlays created from a group of selections. For 3 picks in 2-team parlays, you get 3 separate parlays (AB, AC, BC). If you bet $10 per parlay, your total risk is $30. You can win some bets even if one pick loses, unlike a single parlay where all must hit.
Key Facts About Round Robins
Important things to know
- Round robins split your selections into multiple smaller parlays
- More parlays = lower risk but higher total stake needed
- 3 picks in 2-team parlays = 3 parlays; 4 picks = 6 parlays
- You can profit even if one or more picks lose
- Total stake = (number of parlays) × (stake per parlay)
- Break-even requires fewer winning picks than a straight parlay
- Popular configurations: 3 picks/2-way, 4 picks/2-way, 4 picks/3-way
Frequently Asked Questions
Common questions about round robins
What is a round robin bet?
A round robin is a betting strategy that creates multiple parlay combinations from your selections. Instead of one parlay where all picks must win, you spread risk across smaller parlays. For example, selecting 4 teams with 2-team parlays creates 6 separate parlays, giving you more chances to profit.
How many parlays does a round robin create?
The formula is "n choose k" - for n selections making k-team parlays. Common examples: 3 picks in 2-way = 3 parlays, 4 picks in 2-way = 6 parlays, 4 picks in 3-way = 4 parlays, 5 picks in 2-way = 10 parlays. The number grows quickly with more selections.
Are round robins better than regular parlays?
Round robins have lower variance - you can still profit if some picks lose. However, your total stake is higher and max payout is lower than a single parlay. They're better for managing risk, especially with 4+ selections where hitting all is unlikely.
What happens if one pick in my round robin loses?
Unlike a regular parlay, you don't lose everything. Only parlays containing that losing pick lose. For a 4-team round robin in 2-team parlays (6 total), if one pick loses, you lose 3 parlays but the other 3 can still win.
Should I use round robins for favorites or underdogs?
Round robins work well with moderate favorites (-150 to -200 range) where you expect most to win but want protection. For heavy favorites, the reduced odds make round robins less valuable. For underdogs, single parlays offer better upside.
What is the best round robin strategy?
The optimal approach depends on your confidence level. If very confident in all picks, a straight parlay maximizes profit. For moderate confidence with 4+ picks, 2-way round robins offer good balance. The 3 picks in 2-way is popular for beginners.
How this works
Calculations follow the published mathematics of the game — combinatorics for cards, probability theory for dice, and expected-value accounting for wagers. Results are verified against independent references (primarily Wizard of Odds). No calculation here is an opinion or recommendation; it is arithmetic applied to the rules of the game.
What this tool can’t do
When to consult a professional
This tool computes probability and expected value. It is not a betting system and cannot predict the outcome of any individual wager. If gambling is causing problems for you or someone you know, call the National Problem Gambling Helpline at 1-800-GAMBLER.
Sources
- [1]Wizard of Odds — Michael Shackleford, ASAIndustrywizardofodds.comAccessed Apr 21, 2026
Actuary; widely cited casino-game probability reference. Used for house-edge and EV verification.
- [2]National Council on Problem GamblingOfficial sourcencpgambling.orgAccessed Apr 21, 2026
Responsible-gambling guidance and 1-800-GAMBLER helpline.
Joseph OrdunaFounder & Software Engineer
Full-stack software engineer specializing in embedded systems, web architecture, and AI/ML. Founder of Practical Web Tools. Built the gesture-controlled drone IP acquired by KD Interactive (Aura Drone, sold on Amazon).