A round robin is the parlay bettor’s safety net. Instead of stacking all your picks into one ticket that dies the moment a single leg loses, a round robin splits them into a spread of smaller parlays so you can still cash even when a pick or two goes down. This guide explains how round robins work, walks through a real example, compares them to teasers, and links you to a free calculator and printable worksheet.
What a Round Robin Is
A round robin takes a group of selections and automatically builds every smaller parlay of a size you choose. Pick four teams and run a round robin by 2s and you get six separate 2-team parlays covering every pair. Because your action is spread across many tickets rather than one, a single loss only knocks out the parlays that included that pick, and the rest can still win.
How the Math Works
The number of parlays in a round robin is a simple combination, written N choose k, where N is how many picks you have and k is the parlay size. Four picks by 2s make six parlays; five picks by 2s make ten; five picks by 3s also make ten. Your total stake is that number of parlays times the amount you put on each one, so a round robin always costs more than a single parlay.
A Worked Example
Suppose you have four picks at -110 each and run a round robin by 2s at $10 a parlay. That is six 2-team parlays and a $60 total stake. Each pair at -110 pays about +264, or $36.45 on your $10. If all four legs win, all six parlays cash for $218.68, a profit of roughly $158.68. The key difference from a straight four-team parlay is that if one pick loses, three of your six parlays still win.
Try It: Round Robin Calculator
You do not have to count combinations yourself. Our free round robin calculator takes your number of picks, combine size, odds per leg, and stake and instantly returns the number of parlays, the odds and payout of each, your total stake, and the payout if every leg wins. Enter American or decimal odds and adjust on the fly.
Round Robins vs Teasers
Round robins and teasers both reshape parlay risk, but in opposite ways. A round robin keeps the same prices and spreads your picks across many parlays so a loss or two does not sink you. A teaser instead moves the point spread or total in your favor on a single parlay, buying a safer number in exchange for a smaller payout. Bettors often round robin moneyline and spread slates and reserve teasers for football spreads that cross key numbers like 3 and 7.
When a Round Robin Makes Sense
Round robins shine when you like several picks but are not confident every one will land. Spreading the risk buys survivability, which is why they are popular on busy Saturdays and Sundays. The trade-off is cost: you are placing many bets, so the total stake adds up fast, and the house edge applies to each parlay. Keep your per-parlay stake small and treat the round robin as entertainment, not a system.
Free Printable Round Robin Worksheet
Prefer to map it out on paper? Download the free printable round robin worksheet to list your picks and odds, choose your combine size, and compute the number of parlays, total stake, and payout step by step.
Download the Round Robin Worksheet (PDF)
The Bottom Line
A round robin trades a little upside for a lot of resilience, letting you back several picks without living and dying on all of them landing. Run your slate through the calculator to see the parlays and cost before you commit, keep the stakes sensible, and bet responsibly and within your means.
