No-Vig Fair Odds Calculator

Bookmaker odds always imply more than 100% combined probability — the excess is the vig, the book's built-in margin. Removing it reveals the market's actual opinion: the fair probability and fair odds of every outcome.

This calculator uses the proportional de-vig method — the same one the BetEdge engine applies to Pinnacle's odds to build its fair-value baseline. De-vig a sharp book's line and you get the best public estimate of true probability; compare any other book's price against it and the gap is a measured mispricing.

Home odds

Draw odds

Away odds

Bookmaker overround (vig)

4.81%

Outcome	Implied %	Fair %	Fair odds
Home	47.62%	45.43%	2.201
Draw	29.41%	28.06%	3.563
Away	27.78%	26.50%	3.773

How to use the No-Vig Calculator

1
Choose the market type: 2-way (tennis, totals, spreads) or 3-way (football 1X2).
2
Enter the decimal odds for every outcome of the SAME market at the SAME bookmaker.
3
Read the overround (the book's margin) and the de-vigged fair probability and fair odds per outcome.

Worked examples

Example 1 — the standard -110 / -110 line

Both sides at decimal 1.91: implied probability 52.4% each, summing to 104.8%. The 4.8% excess is the vig. De-vigged, each side is exactly 50% — fair odds 2.00. You are paying 1.91 for something worth 2.00; that gap is the cost of betting random sides.

Example 2 — football 1X2

Home 2.10, Draw 3.40, Away 3.60: implied 47.6% + 29.4% + 27.8% = 104.8%. Proportional de-vig gives fair probabilities of roughly 45.4% / 28.1% / 26.5% and fair odds of 2.20 / 3.56 / 3.77. If another book offers the home side at 2.25 while the fair price is 2.20, that 2.3% gap is the kind of mispricing our edge screen flags.

FAQ

No-Vig Calculator FAQ

What is vig (juice / overround)?

Vig is the bookmaker's margin baked into the odds. If you convert every outcome's odds to implied probability and add them up, the total exceeds 100% — that excess is the overround. A standard -110/-110 line (decimal 1.91/1.91) sums to about 104.8%, meaning the book charges roughly 4.8% on that market regardless of which side wins.

How does the no-vig calculation work?

This calculator uses the proportional (multiplicative) method: each outcome's implied probability is divided by the sum of all implied probabilities, so the rescaled 'fair' probabilities add to exactly 100%. Fair odds are then 1 divided by the fair probability. Other methods exist (power, Shin) that handle favourite-longshot bias differently, but proportional is the standard reference and what BetEdge's engine applies to Pinnacle's odds.

Why de-vig Pinnacle's odds specifically?

Pinnacle runs low margins, accepts sharp action and famously doesn't ban winners — so its de-vigged line is widely treated as the best public estimate of true probability. De-vigging a soft book's odds mostly recovers that book's opinion plus its bias; de-vigging Pinnacle approximates the market's sharpest consensus. That fair value is the baseline BetEdge compares every other bookmaker's price against.

What can I do with the fair odds?

Two things. First, compare: if another book offers higher odds than the fair odds, the gap is a measured mispricing (use our EV calculator to express it in money). Second, feed the fair probability into the Kelly calculator as your win-probability input for staking. Fair odds are an estimate, not a verdict — small gaps are usually noise or stale lines.

BetEdge is an analytics and decision-support tool — not a bookmaker and not a tipster service. We don't accept bets or hold funds. For educational and informational purposes only. 18+.

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