Multi-TD Scorer Parlay Probability & Odds Calculator 31

Parlay Slip Legs

Wager Stake ($):

Leg Count

Combined American

+1814825

Decimal Multiplier

18149.25x

True Probability

0.00551%

Potential Payout ($)

$181,492.50

Monte Carlo 10,000 Slate Simulation

Observed 10k Parlay Hits 0 / 10,000

Average Hit Legs / Slate 0.67 legs

1-in-N Longshot Rarity 1 in 18,149

House Edge / Vig Est. +24.5%

Why the "Trillion Dollar" Parlay Happens

Multi-touchdown (2+ TD) player props carry steep odds (typically +350 to +1200, representing 8%–22% true probability). Compounding 8 to 12 multi-TD legs exponentially multiplies decimal odds: (5.5)⁸ ≈ 837,000x, reaching billions or trillions for a full slate. However, joint independent probability shrinks exponentially: 0.18⁸ ≈ 0.000001%, meaning sportsbooks collect enormous hold margins on casual extreme tickets.