Free tool
Enter your legs and the book's SGP price. We show the independent fair price and the correlation tax — how much the book shaves for pricing the legs together. Pure math, no signup.
Because the legs are correlated — when your quarterback throws for 300 yards, his receiver probably also went over — and the book prices that in. This calculator shows the gap between the independent fair price and what you're being offered: the correlation-plus-margin tax.
No — and the calculator says so on the page. Multiplying the legs assumes they're uncorrelated, which same-game legs never are. The gap it shows is an estimate of what the book charges for correlation and margin together, not a measure of value.
SGPs are among the highest-hold products a sportsbook sells; the calculator exists so you can see the tax before you pay it. That's information, not encouragement — bet responsibly, 21+.
“Independent fair” multiplies the legs as if they were uncorrelated. Same-game legs usually aren't, so this is not the true fair price — the gap is how the book is pricing correlation + its margin. Here the SGP pays less than independent (the usual correlation tax + vig). An estimate, not an edge. Bet responsibly · 21+
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