Asian Handicap Analysis Tool: Odds Margin, Trends & Betting Value
Decode Bookmaker Margins to Calculate Real Win Probability and Value Gaps
Supports Hong Kong odds (e.g., 0.95) and European odds (e.g., 1.95). Auto-detection enabled.
What is De-vigging?
Asian Handicap is the most common betting market in football. Bookmakers add a margin (also called 'vig' or 'juice') to the odds, making the total implied probability exceed 100%. This means the bookmaker always maintains an edge over time.
The de-vig calculator uses mathematical formulas to reveal the true probability distribution, helping bettors identify which markets offer genuine value. Lower margins are more favorable for bettors; higher margins should be approached with caution.
Calculation Formulas
- Implied Probability = 1 ÷ Decimal Odds
- True Probability = Implied Probability ÷ Overround × 100%
- Bookmaker Margin = (Overround - 1) × 100%