Enter both sides of a two-way market. The calculator shows the effective vig (juice) in cents per $100 wagered, the book's hold percentage, and the de-vigged fair odds for each side.
Vig (short for "vigorish," also called "juice") is what the sportsbook charges to take your bet. On a market that's a true 50/50, fair odds would be +100 / +100. What you actually see is -110 / -110 — meaning you have to risk $110 to win $100, instead of $100 to win $100. That extra $10 per $100 wagered is the vig.
The "Vig per $100" output above expresses that tax in cents. On a -110 / -110 market, the vig is roughly $4.55 per $100 wagered — the share of every dollar that goes to the book if action is balanced. The "Market Hold" output is the same number expressed as a percentage of total handle.
Tight markets — moneylines, spreads, and totals on major U.S. sports — typically carry 4.5–5% vig. Sharp offshore books and select Pinnacle-style operators can hold 2–3%. Player props, derivatives, and same-game parlays routinely carry 8–15% vig.
The vig is the single biggest invisible cost of sports betting. Beating a 4.5% vig over the long run requires beating the market's de-vigged fair price by — at minimum — the vig itself. Most casual bettors don't realize how much of every wager goes to juice; sharp bettors price every bet against the de-vigged number, not the marked one. Use our No-Vig Calculator to see the fair number behind any market.