Round Robin Bet Calculator: Parlay Combinations Explained

A round robin combines multiple smaller parlays from your selections—reducing all-or-nothing parlay risk. Our calculator shows every parlay combination, individual payouts, and total return scenarios.

What Is a Round Robin Bet?

A round robin creates all possible parlay combinations from your selected picks. Instead of one big parlay where everything must win, you get multiple smaller parlays. Lose one pick and some parlays still win.

Quick Answer: Round robin = all parlay combinations of your picks. 3 picks → 3 two-team parlays. 4 picks → 6 two-team parlays (or 4 three-teamers, or both). Cost: number of parlays × bet per parlay. Advantage: some parlays can win even if not all picks hit. Disadvantage: higher total cost, still negative EV.

How to Use Our Calculator

Use the Round Robin Calculator →

Enter your picks and bet amount to see all parlay combinations.

Step-by-Step Instructions

1. Enter Selections: Your picks with odds

2. Choose Parlay Size: 2-way, 3-way, etc.

3. Set Bet Per Parlay: Each combination's stake

4. View All Combinations: Every parlay

5. Calculate Scenarios: Win/loss outcomes

Input Fields Explained

Field	Description	Example
Picks	Your selections	4 picks at -110 each
Parlay Size	Combos per parlay	2-way (2 teams each)
Bet Per Parlay	Each parlay stake	$10
Number of Parlays	Total combinations	6 parlays
Total Cost	Complete round robin	$60
Max Payout	If all win	$158.40

Round Robin Combinations

3-Pick Round Robin

Selections: A, B, C

2-way parlays (all 2-team combos):
Parlay 1: A + B
Parlay 2: A + C
Parlay 3: B + C

Total parlays: 3
$10 each = $30 total cost

If all 3 picks win:
All 3 parlays pay
Maximum return

4-Pick Round Robin

Selections: A, B, C, D

2-way parlays: 6 combinations
A+B, A+C, A+D, B+C, B+D, C+D

3-way parlays: 4 combinations
A+B+C, A+B+D, A+C+D, B+C+D

4-way parlay: 1 (regular 4-team parlay)

Choose any or all sizes

5-Pick Round Robin

Selections: A, B, C, D, E

2-way: 10 parlays
3-way: 10 parlays
4-way: 5 parlays
5-way: 1 parlay

Can get expensive quickly
Choose parlay size carefully

Combination Formula

Number of n-team parlays from k picks:
C(k,n) = k! / (n! × (k-n)!)

Examples:
4 picks, 2-team: C(4,2) = 6
5 picks, 3-team: C(5,3) = 10
6 picks, 2-team: C(6,2) = 15

Payout Analysis

All Picks Win

4 picks at -110, 2-way round robin:
$10 per parlay × 6 parlays = $60 cost

Each 2-team parlay at -110/-110:
Pays 2.644× stake = $26.44 per parlay

All 6 win: 6 × $26.44 = $158.64
Profit: $158.64 - $60 = $98.64

One Pick Loses

Same setup, but pick D loses:

Winning parlays: A+B, A+C, B+C (3 of 6)
Losing parlays: A+D, B+D, C+D (3 of 6)

Wins: 3 × $26.44 = $79.32
Losses: 3 × $10 = $30
Net: $79.32 - $60 = +$19.32

Still profit with 1 loss!

Two Picks Lose

Picks C and D lose:

Winning parlays: A+B (only 1)
Losing parlays: 5 others

Wins: 1 × $26.44 = $26.44
Total cost: $60
Net: $26.44 - $60 = -$33.56

Losing more than half = loss

Round Robin vs Straight Parlay

4-Pick Comparison

Same 4 picks at -110:

Straight 4-team parlay ($60):
All 4 must win
Pays: $60 × 12.28 = $736.80
Miss one: Lose $60

2-way Round Robin ($10 × 6 = $60):
All 4 win: +$98.64
3 of 4 win: +$19.32
2 of 4 win: -$33.56
1 of 4 win: -$53.56
0 of 4 win: -$60

Round robin has more outcomes
Lower max win, higher survival

When Round Robin Makes Sense

Risk management:
Don't want all-or-nothing
Okay with lower max payout
Value some-win scenarios

Confidence levels:
Very confident in 3 of 4 picks
Less sure about 4th
Round robin hedges uncertainty

Real-World Examples

Example 1: 3-Pick Sunday Football

Picks:

• Chiefs -110
• 49ers -110
• Bills -110

2-way round robin at $20 each:

Parlays:
1. Chiefs + 49ers
2. Chiefs + Bills
3. 49ers + Bills

Total cost: $60

Results: Chiefs win, 49ers win, Bills lose

Winning parlays: Chiefs + 49ers
Losing parlays: 2 (Bills-related)

Win: $52.88
Loss: $40
Net: +$12.88

Profit despite 1 loss

Example 2: 5-Pick 3-Way Round Robin

Picks: A, B, C, D, E all at -110

3-way round robin at $5 each:

10 parlays × $5 = $50 total

Each 3-team parlay pays: ~$33.35

All 5 win: 10 × $33.35 = $333.50
Profit: $283.50

4 of 5 win: 6 parlays win
6 × $33.35 = $200.10
Profit: $150.10

3 of 5 win: 3 parlays win (the combo that's all 3)
Wait—which 3 matters

If A,B,C win (D,E lose):
Only A+B+C parlay wins
$33.35 - $50 = -$16.65

Example 3: Mixed Odds Round Robin

Picks:

• Team A: -200
• Team B: +150
• Team C: -110
• Team D: +200

2-way round robin at $10 each (6 parlays):

Parlay payouts vary by odds:
A+B: 1.5 × 2.5 = 3.75 → $37.50
A+C: 1.5 × 1.91 = 2.87 → $28.65
A+D: 1.5 × 3.0 = 4.5 → $45.00
B+C: 2.5 × 1.91 = 4.78 → $47.75
B+D: 2.5 × 3.0 = 7.5 → $75.00
C+D: 1.91 × 3.0 = 5.73 → $57.27

Total if all win: $291.17
Cost: $60
Profit: $231.17

Complex calculation but calculator handles it

Example 4: Insurance Concept

You love 3 picks but hedging:

3-pick round robin vs 3-team parlay:

$30 on 3-team parlay:
All 3 win: +$170 (6.7× at -110 each)
Any miss: -$30

$30 split into 3 two-teamers ($10 each):
All 3 win: +$79.32 - $30 = +$49.32
2 of 3 win: +$26.44 - $30 = -$3.56
1 of 3 win: -$30
0 of 3 win: -$30

Round robin: Lower upside, cushioned downside

Common Mistakes

1. Ignoring Total Cost

Mistake: "It's only $5 per parlay" Problem: 15 parlays = $75 total Fix: Calculate total before betting

2. All Underdogs

Mistake: Round robin with all +odds Problem: Still need most to hit Fix: Mix favorites for higher hit rate

3. Too Many Picks

Mistake: 8-pick round robin Problem: Hundreds of combinations possible Fix: 3-5 picks maximum

4. Expecting Different Math

Mistake: "Round robin beats the odds" Problem: Same house edge applies Fix: It's risk management, not edge

Frequently Asked Questions

Do round robins reduce house edge?

No. Each parlay has the same edge. Round robins just spread risk across multiple parlays.

How many picks should I use?

3-5 picks is practical. More picks = more parlays = higher cost and complexity.

Is round robin better than straight parlay?

Different, not better. Lower max win but some payout with partial success. Personal preference.

Can I combine different parlay sizes?

Yes—do 2-way AND 3-way from same picks. Just adds more parlays and cost.

What happens with pushes?

Push reduces parlay to remaining legs. A 2-way parlay with push becomes straight bet on remaining pick.

Are round robins good for beginners?

They're easier to understand than complex parlays, but calculate total cost carefully first.

Pro Tips

• Count total cost: Parlays add up fast

• 3-4 picks sweet spot: Manageable combinations

• Mix confidence levels: Strong picks carry weaker ones

• Check push rules: Know how ties are handled

• Same EV, different variance: Understand the tradeoff

Related Calculators

• Parlay Calculator - Straight parlays
• Sports Betting Odds Calculator - Single bets
• Teaser Calculator - Different combo bet
• Implied Probability Calculator - Convert odds
• Kelly Criterion Calculator - Bet sizing

Conclusion

Round robin bets combine multiple smaller parlays from your selections—allowing some wins even when not all picks hit. Our calculator shows every combination, individual payouts, and return scenarios for any round robin structure.

Calculate Round Robin Payouts Now →

That 4-pick round robin creates 6 two-team parlays for $60 total—but one missed pick still leaves 3 winning parlays. Our calculator maps every scenario, helping you understand the risk/reward tradeoffs of parlay combinations.