Round robin mechanics & rules
In US sports wagering, round robins offer an insurance hedge against a single bad beat ruining a large multi-game parlay.
Payouts are determined by multiplying the unit stake by the cumulative price of each winning selection or combination line. If any selection is scratched or declared non-runner/void, standard rules settle that leg at neutral odds of 1.00.
Worked example: Round robin
Taking 4 NFL teams in a "Round Robin by 2s" creates 6 separate two-team parlays. If 3 teams win at -110 (1.91), +120 (2.20), and -110 (1.91), you cash 3 parlays paying $42.02 + $36.48 + $42.02 = $120.52 on a $60.00 investment ($60.52 profit).
Always check bookmaker maximum payout caps and race terms before placing high-volume system bets.
Round robin inputs & settings
Odds Format & Stake Sizing
Enter odds in American moneyline odds or switch between decimal, fractional, and moneyline formats. Ensure you verify whether you are entering unit stake per bet or total budget.
Settlement Conditions
Select the result for each pick (Won, Placed, Dead Heat, Void, or Lost) to calculate precise return figures.
CALCULATOR QUESTIONS
US Round robin questions
How does a void leg affect a round robin?
When a selection is void, postponed, or scratched, that specific leg counts as a 1.00 multiplier (money returned for that leg), and the multiple bet rolls down into the remaining folds.
What is the difference between unit stake and total stake?
Unit stake is the amount wagered on each individual bet or line. Total stake equals the unit stake multiplied by the total number of bets in the multiple or system wager.
Are gambling and betting winnings taxed?
In the US, gambling winnings are fully taxable as ordinary income by the IRS and state tax authorities, with Form W-2G issued on qualifying high-multiplier wins.