Odds Converter

The same price wears three outfits. American odds say how much you win on $100 (+150) or must risk to win $100 (−200). Decimal odds say your total return per $1 staked (2.50 means $2.50 back, stake included). Implied probability is the break-even win rate baked into the price — bet at 2.50 and you need to win 40% of the time just to tread water.

Type into any field below and the other two update instantly. Two conversions worth memorizing: positive American odds A become decimal 1 + A/100, negative odds become 1 + 100/|A|. And remember that implied probability includes the book's vig — for the true probability of a market, run both sides through the no-vig calculator.