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CalcWolf Sports Betting Convertisseur de Cotes
Sports Betting

Convert Betting Odds — American, Decimal & Fractional

Convert between American (+150), Decimal (2.50), and Fractional (3/2) odds instantly. See implied probability for any format.

📅 Updated April 2026 Formula verified 📖 4 min read 🆓 Free · No sign-up

Les Trois Formats

Américaines (+150, -200) : les plus courantes aux États-Unis. Décimales (2,50) : Europe et reste du monde. Fractionnaires (3/2) : tradition britannique. Les trois expriment la même chose : +150 = 2,50 = 3/2. En France et dans la plupart des pays européens, les cotes décimales sont le standard.

Probabilité Implicite

Chaque cote implique une probabilité. -200 = 66,7%. +150 = 40%. La somme des probabilités implicites dépasse toujours 100% — la différence est la marge du bookmaker (vig/juice).

⚡ CalcWolf Insight

The best odds format for spotting value is implied probability. Train yourself to think in probabilities rather than odds — instead of seeing -150, think "60% implied." Then ask: do I believe this outcome has more or less than a 60% chance? If more, pass. If less, bet the other side.

Frequently asked questions
Comment convertir les cotes américaines en décimales ?
Positives : (cote/100) + 1. +150 = 2,50. Négatives : (100/|cote|) + 1. -200 = 1,50.
Qu'est-ce que la probabilité implicite ?
La probabilité d'un résultat selon la cote. Cote décimale 2,50 = 1/2,50 = 40%. Cote 1,50 = 1/1,50 = 66,7%.
✓ Math logic verified against primary sources → See our verification process
Kevin Glover
Founder, CalcWolf · GLVTS · Blickr
All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →
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