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Vig / Juice Calculator
Calculate the bookmaker's built-in margin (vig). Lower vig means better value. Compare books to find the fairest odds.
Excellent (<3%) — Pinnacle, Betfair Exchange
Good (3-5%) — DraftKings, FanDuel, Bet365
Average (5-8%) — Most recreational sportsbooks
High (8%+) — Avoid for serious betting
What is Vig (Juice)?
The vig (short for vigorish, also called "juice") is the bookmaker's built-in profit margin. It's the reason the implied probabilities of both sides of a bet add up to more than 100%. The difference between 100% and the total is the vig — it's the price you pay for placing the bet.
Why Vig Matters
Lower vig means you're getting closer to the true fair odds. Over hundreds of bets, a 2% difference in vig compounds significantly. If you consistently bet at books with 3% vig instead of 6%, you're effectively doubling your profit margin. This is why sharp bettors are obsessive about finding the best lines.
Fair Odds Explained
The "Fair Odds" shown above are what the odds would be if the bookmaker took zero margin. They represent the true market probability without any vig built in. Compare these to the actual offered odds to see exactly how much you're paying in vig on each side of the market.