Convert between all odds formats and implied probability.
An odds converter translates the same price between the four common formats — decimal (2.10), fractional (11/10), American (+110) and implied probability (47.6%). They all describe the identical payout; only the notation changes. Pick one format you trust and convert every bookmaker's price into it so you're always comparing like with like.
Different bookmakers and regions display odds differently — UK sites lean on fractions, North American books use the American +/- line, and most European books show decimals. Converting everything to one format lets you spot which book actually offers the better price instead of guessing across notations. Implied probability is especially useful because it turns any price into the chance the book is assigning to that outcome, which makes the built-in margin easy to see. The converter only changes how a price is written; it does not tell you the true probability or whether a bet is good value.
Take decimal odds of 2.50. As a fraction that's 3/2 (the profit, 1.50, over the stake, 1). In American notation it's +150, meaning a 100 stake returns 150 profit. The implied probability is 1 ÷ 2.50 = 0.40, or 40% — the chance the bookmaker is pricing in. Stake 1 000 kr at 2.50 and a winning bet returns 2 500 kr in total (1 500 kr profit plus your stake back).
Convert between all odds formats and implied probability.
An odds converter translates the same price between the four common formats — decimal (2.10), fractional (11/10), American (+110) and implied probability (47.6%). They all describe the identical payout; only the notation changes. Pick one format you trust and convert every bookmaker's price into it so you're always comparing like with like.
Different bookmakers and regions display odds differently — UK sites lean on fractions, North American books use the American +/- line, and most European books show decimals. Converting everything to one format lets you spot which book actually offers the better price instead of guessing across notations. Implied probability is especially useful because it turns any price into the chance the book is assigning to that outcome, which makes the built-in margin easy to see. The converter only changes how a price is written; it does not tell you the true probability or whether a bet is good value.
Take decimal odds of 2.50. As a fraction that's 3/2 (the profit, 1.50, over the stake, 1). In American notation it's +150, meaning a 100 stake returns 150 profit. The implied probability is 1 ÷ 2.50 = 0.40, or 40% — the chance the bookmaker is pricing in. Stake 1 000 kr at 2.50 and a winning bet returns 2 500 kr in total (1 500 kr profit plus your stake back).