Betting odds converter
Type odds in any format - American, decimal, fractional, or implied probability - and the other three update instantly.
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Auto-convertsHow odds formats relate
Every odds format encodes the same two numbers: how much a winning bet pays, and what probability the price implies. American odds quote profit relative to $100 (-110 risks $110 to win $100; +145 risks $100 to win $145). Decimal odds quote total return per $1 staked (1.91 returns $1.91 including your stake). Fractional odds quote profit over stake (10/11). Implied probability is simply 1 / decimal.
Why implied probability matters
Implied probability is the break-even win rate for a price. A bet at -110 needs to win 52.4% of the time just to break even. If your own estimate of the true probability is higher than the implied number, the bet has positive expected value - that gap is the entire basis of +EV betting, and it's what our live EV board measures across 16+ books all day.
Quick reference
-110= 1.91 decimal = 10/11 = 52.4% implied+100= 2.00 decimal = 1/1 = 50.0% implied+145= 2.45 decimal = 29/20 = 40.8% implied-200= 1.50 decimal = 1/2 = 66.7% implied
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For analytics and education only. Lines move quickly; verify prices before making any paid decision.