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Arbitrage Calculator

Chris Lollis
By: Chris Lollis | Last Updated: April 21, 2026

Compare two opposing lines and see whether a guaranteed arbitrage profit exists, along with the ideal stake split for each side.

Side 1

Side 2

Side 1 Implied Probability
Side 2 Implied Probability
Combined Implied Probability
Stake on Side 1
Stake on Side 2
Guaranteed Payout
Guaranteed Profit
Guaranteed ROI
Verdict

A true arbitrage opportunity exists when the combined implied probability of both sides is below 100 percent. This tool is designed for two-outcome markets.