Middle / Scalp Calculator
Enter the odds, spreads, and stakes for both sides to calculate the middle window, guaranteed outcomes, and potential profit.
Both sides
American odds, your spread/total number, and stake for each side.
| American odds | Spread / total | Stake | |
|---|---|---|---|
| Side 1 | $ | ||
| Side 2 | $ |
Total staked
$200.00
Middle window
8 pts
Profit if side 1 wins
$-9.09
Profit if side 2 wins
$-9.09
Profit if middle hits
$181.82
Worst case
$-9.09
Best case
$181.82
Frequently Asked Questions
What is middling in sports betting?
Middling is betting on both sides of a spread or total at different numbers, creating a window where both bets can win. For example, betting Team A -3 at one book and Team B +5 at another means if Team A wins by 4, both bets cash.
What is scalping?
Scalping (sometimes called "dutching" spreads) is similar to middling but focuses on locking in a guaranteed profit by exploiting line differences, even when the middle window is very narrow. The worst case is typically a small loss or breakeven.
How do I find middle opportunities?
Middle opportunities arise when different sportsbooks offer sufficiently different lines on the same game. Monitoring line movement across multiple books is essential. PropsEdge scans odds in real time and highlights these opportunities automatically.
What is the risk in a middle bet?
The primary risk is that neither side of the middle hits — one bet wins and the other loses, resulting in a net loss equal to the vig. The middle window must be wide enough relative to the odds to justify the risk. This calculator shows your exact worst-case and best-case scenarios.
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