Cotas converter: six formats, instant results
1win is licenciado under Curaçao 8048/JAZ and hosts 40,000+ betting mercados daily. Use this free cotas converter with código promocional XLBONUS to translate decimal, fractional, American, Hong Kong, Indonesian, and Malay cotas before you place your next bet.
Conversor de cotas
Enter any cotas format below. All other formats update instantly.
How this calculator works
All betting cotas are just different ways of expressing the same underlying probability. The cotas converter takes any single format as input and derives a decimal representation first, then converts outward to every other format using the exact mathematical relationships between them.
Decimal cotas represent total return per unit staked, including your stake. An cotas of 2.50 means a 1-unit bet returns 2.50 units total (1.50 profit). This is the native format at 1win and most European sportsbooks.
Fractional cotas are written as numerator/denominator (e.g. 6/4). Profit equals stake multiplied by numerator/denominator. A 6/4 bet on a 10-unit stake yields 15 units profit.
American (moneyline) cotas use positive numbers for underdogs and negative numbers for favorites. +150 means a 100-unit stake wins 150 profit. -200 means you need to stake 200 to win 100 profit.
Hong Kong cotas equal decimal cotas minus 1 (just the profit per unit). A decimal of 2.50 equals Hong Kong 1.50.
Indonesian cotas work like American but scaled per unit: positive values show profit per unit staked; negative values show how much you stake per unit of profit.
Malay cotas range from -1 to +1. Positive values represent profit per unit; negative values represent required stake per unit of profit. A Malay of -0.67 approximates American -150.
The implied probability formula is: probability = 1 / decimal cotas. A price of 2.50 carries 40% implied probability. Comparing this figure against your own assessed probability tells you whether a bet has positive expected value.
All conversions are lossless within floating-point precision. Fractional cotas are approximated to the nearest standard fraction when displaying (e.g. 1.5/1 rounds to 3/2), though the calculator uses the exact decimal internally for all outputs.
Why use it at 1win
1win offers 40,000+ mercados across 30+ sports in decimal, fractional, and American formats. Switching formats mid-session can cost you if you misread the cotas. Register with code XLBONUS to access the full cotas range and claim your welcome offer instantly.
Preguntas frecuentes
What is the most common cotas format?
Decimal cotas are the global standard used in Europe, Australia, and at 1win. Fractional cotas remain popular in the UK. American (moneyline) cotas dominate North American mercados.
How do I convert decimal to fractional cotas?
Subtract 1 from the decimal, then express as a fraction in lowest terms. Decimal 2.50 becomes (2.50-1)/1 = 3/2 (written as 3/2 or "3 to 2").
What does implied probability mean?
Implied probability is the percentage chance a bookmaker's price implies for an outcome. It equals 1 divided by the decimal cotas. If the market prices an outcome at 2.00, the implied probability is 50%.
How are American cotas converted to decimal?
For positive American cotas: decimal = (American / 100) + 1. For negative: decimal = (100 / |American|) + 1. So +200 = 3.00 decimal and -200 = 1.50 decimal.
What is the overround and why does it matter?
The overround (also called vig or juice) is the sum of all implied probabilities in a market minus 100%. A 5% overround means the book keeps roughly 5 cents per dollar wagered. Lower overround means better value for the bettor.