No-Vig Odds Calculator

No-vig odds are the prices a market implies once the bookmaker's built-in margin is removed. Posted odds always imply probabilities summing to more than one hundred percent, and that excess is the vig. Stripping it out gives the market's actual estimate of each outcome's chance, which is useful for comparing one book's pricing against another or against your own assessment.

Convert each side's American odds to an implied probability, then add them together. A negative price converts as its absolute value divided by that value plus one hundred; a positive price converts as one hundred divided by the price plus one hundred. Subtract one from the total and multiply by one hundred to get the vig as a percentage, also known as the overround.

A market priced at -110 on both sides implies 52.38% for each outcome, totalling 104.76%. That makes the overround 4.76%, which this calculator reports as the vig. You will sometimes see the same market described as a 4.55% hold instead — that figure expresses the margin as a share of total money wagered rather than as an overround, so both numbers are correct.

None — they're two names for the same thing. Vig, short for vigorish, and juice both refer to the built-in margin a sportsbook charges on a bet, priced into the odds rather than billed as a separate fee. Overround is a third term for closely related idea, describing the same margin as the amount by which a market's total implied probability exceeds one hundred percent.

Pricing the margin into both sides of a line lets a book collect a profit on balanced action without bettors seeing a separate charge. On a typical -110/-110 line, a book taking equal money on both sides collects $110 from each side and pays out $100 to the winner, keeping the $10 difference regardless of which side wins, as long as the betting is roughly balanced.

A dime line refers to odds priced at -110 on both sides of a point spread or total, a ten-cent gap from even money that's become the default across most U.S. sportsbooks for those bet types. It's a round, familiar number that gives the book a predictable margin, roughly 4.55% of handle, without needing to adjust the price for every game.

Offered odds are the actual price a sportsbook posts, which include its margin. Fair, or no-vig, odds are what that price would be with the margin mathematically removed. Because the vig always works in the book's favor, fair odds are always a little more generous to the bettor than the offered odds — a -110 offered price corresponds to close to +100 fair odds on an even two-way market.

Not by itself. A no-vig number describes how a specific book priced a specific market once its margin is stripped out — it isn't a prediction of who wins. It becomes more useful only when compared against a price at another book or against your own independent estimate of the true probability, and even then it's one input among several, not a guarantee of a good outcome.

The multiplicative method, which this calculator uses, divides each side's implied probability by the total so the margin is removed proportionally. The additive method instead splits the overround equally between both sides in percentage points. The two produce nearly identical results on a close line like -110/-110, but can diverge on a lopsided line between a heavy favorite and a big underdog.

No — this calculator accepts American odds only, entered as a signed number such as -150 or +130. If a sportsbook quotes decimal or fractional odds, convert to American first: for decimal odds of 2.00 or higher, subtract 1 and multiply by 100; for decimal odds below 2.00, divide -100 by the decimal minus 1. All three formats represent the same underlying price.

For the bettor, yes, all else equal: a lower vig means a smaller gap between the fair odds and the offered odds, so less of the wager's expected value is lost to the book's margin. That's why comparing the vig across books on the same market, sometimes called line shopping, is a common way bettors evaluate which book offers a better price on a given game.

Sportsbooks price each bet type independently based on its own risk and expected betting volume, so the vig on a point spread, a total, and a moneyline for the same game often aren't identical. Moneylines on lopsided games, in particular, sometimes carry a higher overround than a standard -110/-110 spread because the book is managing a wider range of possible payouts on an uneven price.

A no-vig number isn't good or bad on its own — it's simply the fair price a market implies once the bookmaker's margin is removed, so there's nothing to evaluate about it in isolation. What can be good or bad is the offered price next to it: the smaller the gap between a book's posted odds and the no-vig fair odds this calculator produces, the less of your bet's expected value that book's margin is eating, which is why bettors use the comparison to judge one sportsbook's pricing against another.

Draw-no-bet odds aren't produced by de-vigging a two-way market — they come from folding a soccer match's draw price into the win price using its own formula: take one minus the reciprocal of the decimal draw odds, then multiply that by the decimal odds for the side you want. For example, draw odds of 4.40 and a home win price of 1.68 give (1 - 1/4.40) x 1.68 = 1.30 for home draw-no-bet, refunding the stake if the match ends level. This calculator computes de-vigged fair odds for a two-way market you already have, not draw-no-bet conversions from a three-way line, so a DNB price needs this separate calculation first.

The power method raises each side's implied probability to a constant exponent, solved so the adjusted probabilities sum to exactly one, rather than dividing by the total the way the multiplicative method does. Both usually land close together on a normal line, but the power method is built to stay mathematically valid — every output stays between 0% and 100% — even on the most lopsided lines, where other methods can occasionally misbehave at the extremes. This calculator uses the multiplicative method, which is simpler to compute and produces results close enough to the power method that the difference rarely matters outside of academic odds modeling.