Odds Converter: American, Decimal and Implied Probability
Type a price in any box and the other two fill in. FanDuel and DraftKings show American odds by default, like -110 or +150; decimal odds and implied probability describe the same price in other ways.
At -110, a $100 bet profits $90.91 if it wins ($190.91 back with the stake). The price implies a 52.4% chance.
How the conversion works
American to decimal. Plus odds: divide by 100 and add 1, so +150 is 2.50. Minus odds: divide 100 by the number (without the minus) and add 1, so -110 is 1.91.
Decimal to American. At 2.00 or above: subtract 1 and multiply by 100, so 2.50 is +150. Below 2.00: divide -100 by (decimal - 1), so 1.50 is -200.
Implied probability. Divide 1 by the decimal odds. That is the win rate the price itself assumes, with the book's margin built in, which is why both sides of a -110 / -110 market add up to more than 100%.
Comparing the same bet at two books is easier in implied probability: the lower number is the better price for you.
Learn the math
Questions
How do you convert American odds to decimal odds?
For plus odds, divide by 100 and add 1: +150 becomes 2.50. For minus odds, divide 100 by the number without the minus sign and add 1: -110 becomes 1.91. Decimal odds are the total return per $1 staked, stake included.
How do you turn odds into an implied probability?
Divide 1 by the decimal odds. -110 is 1.91 in decimal, so its implied probability is 1 / 1.91 = 52.4%. For plus odds you can also use 100 / (odds + 100): +150 is 100 / 250 = 40%.
Are +100 and -100 the same?
Yes. Both are even money: a $100 bet profits $100, the decimal price is 2.00 and the implied probability is 50%.
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Math only: these calculators work out what a price implies. They don't predict results. DARIMARKET is research, not a sportsbook. 21+ only, and only where legal. If it stops being fun, call or text 1-800-MY-RESET (1-800-697-3738).