Probability to decimal odds: $d = 1 / p$ - Decimal odds to probability: $p = 1 / d$ - Probability to American odds: If $p \geq 0.5$: $A = -100p / (1-p)$; if $p < 0.5$: $A = +100(1-p) / p$ - The "implied prob with vig" column assumes a typical 4.5% overround (vigorish), illustrating how bookmakers sh