Parlay Arbitrage Lab

Start with real decimal odds for each side of a binary market. We compute the single-leg arb percentage, then extend it to an N-leg parlay that covers all 2ⁿ outcomes using dutched stakes.

Inputs

Decimal odds (Side A) 1.81

Decimal odds (Side B) 2.10

Number of legs (n) 4

Total stake ($) $1,000

Live Metrics

Guaranteed ROI 0.00%

Guaranteed Profit $0

Total Bets Needed 16

Avg Stake per Bet $62.50

Arb Exists

Formula Walkthrough

Assumes the same two-way market odds for every leg; dutching allocates stake proportional to 1/parlay odds for each outcome combination.

ROI vs Legs

Compounding Table (Legs 1–10)

Legs	Total Bets	Guaranteed ROI	Guaranteed Profit	Stake / Bet

Truth Table (2ⁿ Outcomes)

Outcome	Parlay Odds	Stake / Bet	Payout