Tool
True Odds (Vig-Removed) Calculator
Strip out bookmaker margin to see fair odds and implied edge on any price.
Tool
True Odds (Vig-Removed) Calculator
Strip bookmaker margin to see true price and implied edge.
Market price
Market price
Vig-free numbers update instantly as you type.
Book margin+4.8%
True probability · Side A50.0%(market 52.4%)
True probability · Side B50.0%(market 52.4%)
Vig-free breakdown
Market
Market implied probability (A)52.4%
Market implied probability (B)52.4%
Book margin (overround)+4.8% (104.8% total)
True probabilities
True probability (A)50.0%
True probability (B)50.0%
Vig-free odds
Vig-free decimal odds (A)2.000
Vig-free decimal odds (B)2.000
Vig-free American odds (A)+100
Vig-free American odds (B)+100
How we calculate this
Each side’s implied probability is derived directly from its quoted odds.
The bookmaker’s margin (“vig” or “overround”) is how much implied probabilities exceed 100%.
We normalize those implied probabilities back to 100% to surface the true win chances.
True probabilities convert into fair decimal and American odds for cleaner price comparisons.