Odds converter
Type a price in any format, American (−110, +150), decimal (1.91) or fractional (10/11), or a probability, and the others follow. The implied probability is the chance the price stands for, the book’s margin included.
Worked example −110 in American odds is 1.91 in decimal and 10/11 in fractional, and implies a 52.38% chance.
−110 = 1.91 = 10/11 = 52.38%
How it works
From American odds: a plus price is the profit on a stake of 100, so decimal odds = 1 + price ÷ 100 (+150 is 2.50); a minus price is the stake that wins 100, so decimal odds = 1 + 100 ÷ the price without its sign (−110 is 1.91).
Fractional odds are profit over stake, so decimal odds = 1 + the fraction (5/2 is 3.50, 10/11 is 1.91). Evens is 1/1, 2.00 or +100.
Implied probability = 1 ÷ decimal odds. It still contains the book’s margin: the no-vig calculator takes it out.
Arithmetic on the numbers you enter, for research. It is not betting advice: Keel Stats sells no picks and links to no sportsbook. Responsible gaming