Every BetUnfair dashboard comes with a built-in set of Quick Tools. This tool includes different small calculators that turn raw odds into real betting decisions. No spreadsheets, no switching tabs. Just open the panel and work directly with the prices in front of you.

In this Part 1 we’ll cover the first three: Margin, De-Vig Odds, Arbitrage and EV. Part 2 and 3 will take on EV , Kelly Stake, Free Bet Converter and the rest.

To keep this simple, we’re going to use real odds from a real match: Spain vs Austria, playing today at the World Cup. Every number you see below is taken straight from that game, so you can follow along on your own screen.

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⚽ Our Live Example: Spain vs Austria

Here’s the Full Time Result market for Spain vs Austria, with Pinnacle (a sharp book) selected:

What each colour means:

– 🔵 Blue (current bookmaker odds). The live price Pinnacle actually shows on their site right now, margin included. These are the real, bettable odds.

– 🟡 Yellow (current true odds). The exact same Pinnacle market, but with the vig/margin removed. This is the “fair” price that reflects the real probability.

– 🔴 Red (opening odds). Where Pinnacle first priced the market when it opened. Comparing red to blue shows you how the line has moved since.

What each colour represents is fully customizable, you decide what each line stands for, so the odds on your dashboard reflect exactly what matters to your betting.

These are the 🔵 blue current bookmaker odds, the prices Pinnacle is actually offering right now:

– Home (Spain): 1.31

– Draw: 5.55

– Away (Austria): 12.00

We use the blue prices because the tools work on the real, bettable odds, the ones with the margin still inside them. That’s what lets Margin measure the vig, De-Vig strip it out, and Arbitrage compare true prices across books.These three numbers are the inputs we’ll plug into every tool below.

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🎯 De-Vig Odds: What Are the True Odds?

Once you know a market has a margin baked in, the best next question is: what would the odds be without it? 

The De-Vig tool strips out the bookmaker’s margin (their profit) and shows you the fair odds, the price that reflects the real probability of each outcome.

If a soft book is offering you greaters odds than these fair odds, that’s a value bet. De-vigged odds are the benchmark you compare everything against.

Our example: We plugged in the same numbers: 1.31 / 5.55 / 12.00.

The de-vigged prices come out slightly longer:

Outcome	Raw Odds	Fair (De-Vigged) Odds
Spain	1.31	1.324
Draw	5.55	5.927
Austria	12.00	13.198

The odds are higher because we removed the margin. 

In plain terms: Spain’s true chance of winning is about 75.5% (1 ÷ 1.324), not the 76.3% that the raw 1.31 implied. Now, if any soft book offers Spain at, say, 1.40, you know you’re getting real value, because the fair price is only 1.324.

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⚖️ Arbitrage: Guaranteed Profit, Explained

An arbitrage (or “surebet”) happens when different bookmakers price the same match differently enough that you can back every outcome and win no matter the result. The tool checks whether that’s possible and tells you exactly how much to stake on each side.

Arbitrage is used for spotting guaranteed-profit situations and splitting your stake correctly across outcomes.

Our example: With Pinnacle alone there’s no arbitrage. But imagine a soft book offers Spain at 1.57 while the draw in Pinnacle stays at 5.55 and Austria at 12.00. If you plug those in with a €100 total stake:

– Bet €70.74 on Spain (1.57)

– Bet €20.01 on the Draw (5.55)

– Bet €9.25 on Austria (12.00)

Whatever happens, you get back around €111.05 on a €100 stake, a guaranteed +11.05% profit. Eleven euros doesn’t sound like much, but an 11% return on a risk-free bet is huge. Scale it up and it’s obvious: €1,000 becomes €111 in free profit, €10,000 becomes €1,110. The profit percentage stays the same no matter the result, so the only variable is how much you put in.

The catch: you need those specific prices at the same time across different books, which is exactly what BetUnfair’s odds monitoring helps you spot.

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📊 Margin: How Much Is the Bookmaker Charging?

Every bookmaker hides a small fee inside their odds, that’s how they make money. This fee is called the margin or “vig”. This tool adds up all the outcomes and shows you exactly how big that fee is. If there were no fee, the numbers would add up to 100%; anything above that is the bookmaker’s cut.

What it’s for: Seeing how “expensive” a market is. A low margin means fair prices and better value for you. A high margin means the bookmaker is taking more, so your odds are worse.

Our example: We entered Spain’s 1.31, the 5.55 draw and Austria’s 12.00.

The tool shows 2.62%, meaning the odds add up to 102.62% instead of a fair 100%. That 2.62% is Pinnacle’s cut, and it’s very small. That’s exactly why sharp books like Pinnacle are so valuable: their fee is small, so their prices are close to fair. A soft bookmaker would often charge 5–7% on the same match, more than double the cut, and worse odds for you.

The takeaway: with these tools you can quickly see how much fee a bookmaker is hiding in your bet, spot when a market is overpriced, and choose the book that gives you the fairest price every time you bet.

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🔜 Coming in Part 2

That’s the first three tools. In Part 2 we’ll cover EV (measuring the value of a bet) and Kelly Stake (how much to actually bet), using real match odds so you can follow along.

Want to try these on today’s matches yourself? Start your free 5-day BetUnfair trial at https://betunfair.io

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Keywords: de-vig odds calculator · betting margin calculator · arbitrage calculator · surebet calculator · no vig odds · true odds vs implied odds · how to remove the vig · value betting tools · sharp bookmaker odds · betting overround explained  · world cup betting  · smart betting  · arbitrage