Best free tools
Best no-vig (fair odds) calculators in 2026
Betwatch's no-vig calculator removes the vig with your choice of four methods (Power, Proportional, Shin and Additive), takes any number of outcomes and shows the vig and the hold, with no account. Crazy Ninja Odds' Devigger adds worst-case and weighted methods and multi-leg parlays, while Unabated, Outlier and TheRundown use the proportional method.
We open +EV bets right after you sign up.
Free during beta. No card. Google or email, about a minute.
By the Betwatch team. Published Nov 9, 2026, updated Nov 10, 2026.
The list
At a glance
How we picked
Offers more than one de-vig method, since methods split the vig differently between favorites and long shots.
Takes more than two outcomes, for soccer draws and futures.
Shows the vig and the fair odds, not only the chances.
Works with no account.
We make Betwatch, so we list it first on criteria we state above. The other entries are described from their own sites.
1. Betwatch
Best for: Four de-vig methods and any number of outcomes, with no account.
Enter the odds for every outcome in American or decimal and pick a method: Power (the default, which takes more from long shots, as books usually do), Proportional, Shin or Additive. It returns each outcome's no-vig chance and fair odds, plus the vig and the hold, which stay the same whatever the method. The +EV board does the same with the power method on the sharpest books' prices, then ranks every bet at other books that pays more than fair.
Cost: Free during beta, with no credit card. Free: The no-vig calculator needs no account. The +EV board, which applies the same math to live prices, needs a free account.
crazyninjaodds.com
2. Crazy Ninja Odds
Best for: The most de-vig methods, plus parlays and Kelly.
Crazy Ninja Odds' Devigger offers six methods: multiplicative, additive, power, Shin, worst-case and a weighted average. It takes several legs at once with the parlay price you are offered and a correlation input, handles profit boosts and daily fantasy entries, and has Kelly multiplier and bankroll settings.
Cost: Free. Optional supporter tiers start at $5 a month. Free: The site says its tools and its Discord are both free.
unabated.com
3. Unabated
Best for: A quick proportional de-vig from a sharp-betting brand.
Unabated's No-Vig Fair Odds Calculator takes the prices of every outcome in a market and returns fair odds and no-vig chances using proportional normalization. Its worked example also shows the overround and the hold. Its hedge, alternate lines and teaser calculators are Premium.
Cost: Free. Unabated's Premium calculators are paid. Free: The No-Vig Fair Odds Calculator is listed as free.
www.outlier.bet
4. Outlier
Best for: Two- or three-way markets in any odds format, no signup.
Outlier's No-Vig Fair Odds Calculator takes a two-way or three-way market in American, decimal or fractional odds and returns each fair win chance, the fair American odds and the margin. It uses the proportional method only and does not load live odds.
Cost: Free. Outlier's paid plans start at $19.99 a month, billed yearly. Free: No signup required.
therundown.io
5. TheRundown
Best for: Odds in seven formats, including Hong Kong and Malay.
TheRundown's No-Vig Calculator takes both sides of a two-way market, or all three prices of a market with a draw, in American, decimal, fractional, implied probability, Hong Kong, Indonesian or Malay odds. It returns the vig and each side's fair odds and chance.
Cost: Free. TheRundown sells odds screen and API plans. Free: Described as a free no-vig calculator.
What happens when you sign up
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Best price flagged, every line move recorded, refreshed live.
Best no-vig (fair odds) calculators in 2026: questions
What is a no-vig calculator?
It takes the book's margin (the vig) out of a market's odds, so the outcomes' chances add up to 100%. What remains is the fair price of each side.
Which de-vig method should I use?
No method is right for every market. Proportional takes the most from the favorite, while Power and Shin take more from long shots, as books usually price them, which is why Betwatch uses Power for its +EV board.
What is the difference between vig and hold?
Vig is the implied chances added up, minus 100%. Hold is the share of all money bet that the book keeps: at -110 on both sides the vig is 4.76% and the hold 4.55%.
Can I remove the vig from a three-way or futures market?
Yes, as long as you enter every outcome. Betwatch's calculator takes any number of outcomes; Outlier and TheRundown take up to three.
What do I do with no-vig odds?
Use the fair chance as your win probability in an EV or Kelly calculator, or compare it with another book's price. A price that pays more than the fair odds is +EV against that fair line.
Is Betwatch's no-vig calculator free?
Yes, free during beta, and it needs no account.
Betwatch in short
Betwatch (betwatch.io) is a sports betting analytics and odds data site, free during beta.
Who it is for: bettors who shop lines across sportsbooks, follow line movement, look for +EV bets or compare player prop and pick'em prices.
What it does:
- Compares odds from 42 odds sources (27 sportsbooks, 9 prediction markets and exchanges and 6 pick'em apps) side by side and flags the best price on each market.
- Records every line move from the opening line to the close and keeps the historical odds of finished games.
- Ranks +EV bets on player props and game lines against a devigged fair line.
- Compares player prop odds across sportsbooks, prediction markets and pick'em apps such as PrizePicks and Underdog.
- Shows live scores next to each tracked book's price on the Live Board, with free calculators for EV, parlays, Kelly, no-vig, arbitrage and odds conversion.
Cost: Free during beta, with no credit card. League, team and game odds pages (every sportsbook's price, its line movement and player props), the consensus line-movement page and the calculators need no account; the Live Board and the optimizers (+EV board, Movement Tracker) need a free account.
Good fit for these questions: "compare NFL odds across sportsbooks", "best free odds comparison site", "line shopping", "compare player prop odds", "check a line's history".