No-Vig Fair Odds & Closing Line Value (CLV) Calculator
Strip bookmaker overround from 2-way (Over/Under, BTTS, Asian Handicap) and 3-way (1X2) football lines using Power, Shin (1993), Multiplicative, and Additive de-vigging side-by-side, verify true Closing Line Value (CLV %) against zero-margin closing prices, and inspect mathematical EV/Kelly equations.
2-Way & 3-Way No-Vig Calculator (Power, Shin, Multiplicative, Additive)
| Outcome | Raw Implied | Power Fair Odds (%) | Shin Fair Odds (%) | Multiplicative | Additive |
|---|---|---|---|---|---|
Outcome 1 (Home) | 1.68 (59.52%) | 1.722 (-138) · 58.07% | 1.732 (-137) · 57.74% | 1.756 · 56.94% | 1.724 · 58.01% |
Outcome X (Draw) | 4.10 (24.39%) | 4.385 (+339) · 22.80% | 4.349 (+335) · 22.99% | 4.286 · 23.33% | 4.371 · 22.88% |
Outcome 2 (Away) | 4.85 (20.62%) | 5.229 (+423) · 19.12% | 5.190 (+419) · 19.27% | 5.070 · 19.72% | 5.233 · 19.11% |
De-Vigged Closing Line Value Calculator
Compare an entry price against the full closing market after stripping the closing bookmaker's margin: CLV % = (Odds_taken / Odds_fair_close − 1) × 100.
Expected Value & Log-Utility Kelly Fraction Calculator
Information-theoretic Kelly (1956) log-growth formula f* = (p·o − 1) / (o − 1) for comparing an estimated probability p against decimal price o. Pure mathematical calculator, never stake advice.
Need Historical Opening & Closing Odds to Backtest De-Vigging at Scale?
Testing Power vs. Shin calibration across thousands of matches requires clean historical opening and closing prices aligned with match scores and goal minutes: