Middle Calculator

What a middle is

A middle is when you bet both sides of a game at different numbers, leaving a gap where both bets can win. Bet an over 3.5 at one book and an under 5.5 at another, and if the total lands on 4 or 5 you win both tickets. When the result misses the window, one side wins and one loses, so your only cost is the small combined vig. That asymmetry — a big win when it hits, a tiny loss when it misses — is what makes middles worth hunting.

How to use it

Enter both prices and stakes to see the hit profit, the miss cost, and the break-even hit rate the middle needs to be +EV. The lines are optional and just show the width of your window. The reason this tool is uniquely ours: a middle only exists when two books disagree on the number, and The Odds Gap holds every book's line at once. The Hedge Finder runs the same cross-book engine that surfaces arbs, so it is where live middles show up. To understand the sibling strategy, read the Arbitrage Betting explainer.

Keep going

The Odds Gap holds every book's price, so you do not have to type them in by hand. Skip straight to the live tools: