No-Vig Calculator
Strips the bookmaker margin (vig) to reveal the true fair price using multiple devig methods.
How it works
Inputs
- Market odds for each outcome
- Devig method (multiplicative, additive, power, shin)
Results
- Overround %
- Fair probability per outcome
- Fair odds
- Vig per side
When to use
Use to find the true probability of outcomes and identify value bets.
Example
Both sides at 1.91 → overround 4.76%, true fair odds are 2.00 each (50/50 market).
Frequently Asked Questions
What is vig (vigorish) in betting?
Vig is the bookmaker's built-in margin. If a fair coin flip should be 2.00 odds on both sides, a bookie might offer 1.91/1.91 — the 4.76% overround is their profit margin.
Which devig method should I use?
Multiplicative is the most common and works well for two-outcome markets. Shin method is more accurate for markets with many outcomes (like horse racing) as it accounts for informed money.
Need live odds data?
HyperOdds automatically finds the best odds across all major Australian bookmakers in real-time.