3-Way No-Vig Calculator: How to Find True Odds for 3-Outcome Betting Markets (2026 Guide)
A 3-way no-vig calculator removes the sportsbook’s margin from three-outcome markets—like soccer or hockey moneylines—revealing the "true" probabilities and fair odds for each outcome. You can calculate these no-vig odds from any set of three prices, whether in American, decimal, or fractional format, using a simple formula or an online tool.
What Are 3-Way Betting Markets?
Unlike traditional two-outcome markets (like tennis match winners or NFL moneylines), 3-way betting markets offer three possible results. The most common examples are:
- Soccer Full-Time Result: Home Win / Draw / Away Win
- Hockey Regulation: Home Win / Draw / Away Win
In these markets, the sportsbook sets odds on each of the three possible outcomes. But those odds include vig—also called overround or margin—which means the implied probabilities add up to more than 100%.
Why Remove the Vig?
The vig is the sportsbook’s edge: it ensures they earn a profit regardless of the result (in theory). When comparing prices across venues—or looking for arbitrage or value—it’s critical to "devig" the odds, so you’re comparing true implied probabilities rather than prices padded with the book’s margin. This is especially important in markets where small pricing gaps can signal an opportunity.
The Math: How to Calculate 3-Way No-Vig Odds
Let’s walk through a real-world example using typical soccer odds:
Suppose a sportsbook offers these odds (decimal):
| Outcome | Odds (Decimal) |
|---|---|
| Home | 2.60 |
| Draw | 3.20 |
| Away | 2.90 |
Step 1: Convert Odds to Implied Probabilities
Implied probability (decimal odds) = 1 / odds
| Outcome | Odds | Implied Probability |
|---|---|---|
| Home | 2.60 | 0.3846 |
| Draw | 3.20 | 0.3125 |
| Away | 2.90 | 0.3448 |
Sum of implied probabilities:
0.3846 + 0.3125 + 0.3448 = 1.0419 (104.19%)
The 4.19% above 100% is the sportsbook’s margin (vig).
Step 2: Remove the Vig (No-Vig Adjustment)
To get the fair, or no-vig, probabilities:
No-vig probability for each outcome = (Implied Probability) / (Total Implied Probabilities)
| Outcome | Implied Probability | No-Vig Probability |
|---|---|---|
| Home | 0.3846 | 0.3846 / 1.0419 = 0.3691 |
| Draw | 0.3125 | 0.3125 / 1.0419 = 0.3000 |
| Away | 0.3448 | 0.3448 / 1.0419 = 0.3309 |
Check: 0.3691 + 0.3000 + 0.3309 = 1.0000
Step 3: Convert No-Vig Probabilities Back to Odds
No-vig odds (decimal) = 1 / (No-Vig Probability)
| Outcome | No-Vig Probability | No-Vig Odds (Decimal) |
|---|---|---|
| Home | 0.3691 | 2.71 |
| Draw | 0.3000 | 3.33 |
| Away | 0.3309 | 3.02 |
These are the "fair" odds suggested by the market, without the sportsbook’s edge.
Use Cases: Why 3-Way No-Vig Odds Matter
- Comparing prices: If you’re looking at multiple sportsbooks or prediction markets, no-vig odds give you a true apples-to-apples comparison.
- Finding arbitrage: Arbitrage opportunities often hide in small pricing gaps between venues—and are easier to spot using no-vig probabilities.
- Pricing on prediction markets: Since platforms like Kalshi and Polymarket may offer "draw" options on some events, knowing the true implied probabilities can highlight cross-venue opportunities (see ArbMonster for live cross-venue scanning).
Worked Example: Manual 3-Way No-Vig Calculation
Let’s do a step-by-step example with American odds:
Odds:
- Home: +160
- Draw: +220
- Away: +190
First, convert American odds to decimal odds:
- +160: (160/100) + 1 = 2.60
- +220: (220/100) + 1 = 3.20
- +190: (190/100) + 1 = 2.90
(You can use this odds converter tool for any format.)
Follow Steps 1–3 above with these decimals, or use ArbMonster’s 3-way no-vig calculator for an instant answer.
Free 3-Way No-Vig Calculator Online
You can use the ArbMonster no-vig calculator to devig any set of two or three odds, in any format. Just enter the odds, and it outputs the fair probabilities and "no-vig" odds for each outcome. This matches the method above, but automates the math and supports decimal, American, or fractional odds.
How Vig Is Measured Across Sportsbooks
Vig, or overround, varies between books and markets. ArbMonster’s sportsbook vig rankings track the real-world margin across 20+ U.S. sportsbooks, refreshed every 15 minutes—so you can compare not just the odds, but the true cost of betting.
Key Takeaways
- 3-way no-vig calculators strip out the sportsbook’s edge in soccer, hockey, and other three-outcome markets.
- The process: convert odds to probabilities, sum, divide each by the total to get no-vig probabilities, and invert for no-vig odds.
- This helps compare true market-implied probabilities, spot arbitrage, and understand bookmaker pricing.
- Online tools like ArbMonster’s no-vig calculator automate this process for any odds format.
FAQ
Q: What is a 3-way no-vig calculator?
A 3-way no-vig calculator is an online or manual tool that removes the sportsbook’s edge (vig) from three-outcome betting odds—like in soccer or hockey—revealing the fair implied probabilities and true odds for each outcome. This allows for apples-to-apples comparison and aids in finding value or arbitrage opportunities.
Q: Why do the probabilities from sportsbook odds add up to more than 100%?
The sum exceeds 100% because sportsbooks build in a margin (vig or overround) to guarantee profit over time. This means the published odds are less favorable than the underlying fair odds. Removing the vig reveals the market’s consensus on each outcome’s true probability.
Q: Can I use a no-vig calculator for prediction market odds?
Yes, but prediction markets like Kalshi and Polymarket typically list prices as probabilities (between $0 and $1/share), so the "vig" appears as taker fees or maker-taker spreads rather than baked into the odds. You can still apply the no-vig concept when comparing across venues or when the market structure supports it.
Q: Where can I find a reliable 3-way no-vig calculator online?
You can use the ArbMonster no-vig calculator, which handles both two- and three-outcome markets, supports multiple odds formats, and shows true implied probabilities and fair odds—net of fees, where applicable.
ArbMonster is a data service. Nothing here is financial or betting advice; markets carry risk, venues have age and jurisdiction restrictions, and you are responsible for verifying everything before acting.