Odds Converter

There are 3 formats of stating odds that most bookmakers and websites support: Fractional, Decimal and American format.

Fractional format

Fractional format is used mostly in the UK and Ireland. Fractions state the potential profit should the bet succeed, relative to the stake. For example if €5 is bet at odds of 2/1 the potential profit is €10 (€5 * 2) and the total returned is €15 (€10 plus the €5 stake).

Decimal format

Decimals state the potential return should the bet succeed, relative to the stake. For example if €5 is bet at odds of 3 the total returned is €15 (€5 * 3) the potential profit is €10 (€5 * 3 minus the €5 stake).

American format

Positive figures: The odds state the winnings on a €100 bet e.g. american odds of 110 would win €110 on a €100 bet. Negative figures: The odds state how much must be bet to win €100 profit e.g. american odds of -120 would win €100 on a €120 bet.

Conversion

American to decimal odds

If american odds are positive: 1 plus (american odds divided by 100) e.g. american odds of 300 = 1 + (300/100) = 4. If american odds are negative: 1 minus (100 divided by the american odds) e.g. american odds of -300 = 1 - (100/-300) = 1.333.

American to fractional odds

If american odds are positive: The american odds dividend by 100 e.g. american odds of 300 = 300/100 = 3/1. If american odds are negative: Minus 100 divided by the american odds e.g. american odds of -300 = -100/-300 = 1/3.

Fractional to decimal odds

Add 1 to the fractional representation e.g. a fractional value of 3/1 = (3/1) + 1 = 4.

Fractional to american odds

If fraction is >= 1: The fractional value multiplied by 100 e.g. a fractional odds of 3/1 = (3/1) * 100 = 300. If fraction is < 1: Negative 100 divided by the fractional odds e.g. a fractional value of 1/5 = -100 / (1/5) = -500.

Decimal to fractional odds

Subtract 1 from the decimal representation e.g. a decimal value of 3 = 3 - 1 = 2 which is commonly expressed as 2/1.

Decimal to american odds

If decimal odds are >= 2: The decimal value minus one multiplied by 100 e.g. a decimal value of 3 = (3 - 1) * 100 = 200. If decimal odds are < 2: Negative 100 divided by (the decimal odds minus one) e.g. a decimal value of 1.2 = -100 / (1.2 - 1) = -500.