PAPER TRADING / RESEARCH ONLYNo bets are placed, no sportsbook is connected, and no result here is a prediction or a guarantee. All figures are estimates from a small sample.
ELEdgeLab

Parlay calculator

2–10 legs. Enter each price and your probability estimate.

2 / 10 legs
  1. Leg 1

    Implied 52.38%

  2. Leg 2

    Implied 52.38%

Combined decimal odds
3.645
Combined American odds
+264
Raw combined implied probability
27.44%
Total payout if all win
$36.45

Fill in every leg's probability to see the independence estimate, edge and EV.

Formula & assumptions
  • Combined decimal odds = product of each leg's decimal odds.
  • Raw implied probability = 1 / combined decimal (includes every leg's margin).
  • Estimated probability = product of your leg probabilities — assumes legs are independent.
  • Edge = estimated − implied (percentage points). Fair decimal = 1 / estimated probability.
  • EV = p × profit − (1 − p) × stake; ROI = EV / stake. Errors in each leg compound.

Implied / break-even probability comes from the sportsbook's price. Your true probability is your own estimate, and the edge is only as good as that estimate. Results are uncertain, not guaranteed, and this is not betting advice.