Betting odds converter.
American to decimal to implied probability, instantly. The implied number is the one that matters: it's the win rate you need just to break even.
The app strips the vig on every game on the board, so the fair number is already there next to every price. Chat with Big Mike ›How to convert American odds to decimal and implied probability
American odds show how much you win on $100 (+150) or how much you risk to win $100 (-150). Decimal odds show your total return per $1 staked. Implied probability converts either into the win rate the price assumes.
Why implied probability is the number that matters
The conversion that changes how you bet is the last one. -110 implies 52.4%. That means a coin-flip market priced at -110 on both sides needs you to be right more than 52.4% of the time before you make a cent. Every price is a probability wearing a costume.
Every tool downstream of this one — EV, Kelly, hold — starts from this conversion. Read a price as a probability at a glance and you are already ahead of most of the betting public.
Common questions
How do you convert American odds to implied probability?
For negative odds: odds ÷ (odds + 100). For positive odds: 100 ÷ (odds + 100). So -110 implies 110/210 = 52.4%, and +150 implies 100/250 = 40%.
What do -110 odds mean?
You risk $110 to win $100. The implied probability is 52.4%, which is also the win rate you need long-term to break even at that price.
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