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Arbitrage Calculator

Arbitrage betting exploits different odds at different bookmakers to guarantee profit regardless of outcome. Enter the odds for both outcomes to check if an arb exists.

Odds — Outcome 1

Odds — Outcome 2

Total Investment ($)

Arbitrage opportunity found!

Implied margin: 98.12%

Guaranteed Profit

+$18.8

Arb %

1.88%

Optimal Stakes

Outcome 1 · @2.10

$485.29

Payout: $1019.11

Outcome 2 · @1.98

$514.71

Payout: $1019.13

Kelly Criterion Calculator

Calculate optimal bet sizing using the Kelly criterion. Get full, half, and quarter Kelly stakes for any bet.

Expected Value Calculator

Calculate the expected value of any bet to determine whether it has positive or negative edge.

What is Arbitrage Betting?

Arbitrage betting involves placing bets on all possible outcomes of an event at different bookmakers where the combined implied probability is less than 100%. This guarantees a profit regardless of the result. Arb opportunities are rare and typically small (1-5%).

Formula: Arb exists when (1/Odds1) + (1/Odds2) < 1. The arb percentage = 1 - ((1/Odds1) + (1/Odds2)).

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