How can we help you?

Odds converter

Smarkets’s odds converter converts decimal odds, American odds, fractional odds and percentage odds into your preferred odds format, so you can quickly identify the best odds across bookmakers and betting exchanges.

It is fundamental to understand how to convert betting odds, but our odds converter conveniently calculates it for you as well.

How to use the odds converter

  1. Enter the odds in the relevant field you would like to convert
  2. Our odds converter will then convert into all other formats
  3. The underlying system on the Smarkets exchange matches bets between users in percentage prices. The available nearest price you can bet on will be displayed in the Smarkets nearest tick section.

Bookmakers and exchanges offer a number of different odds formats as standard. No matter the format used, the probability is always the same. It’s just the presentation that differs.

Familiarity, nationality, the bookmaker/exchange used or the sport bet on can all determine which odds format bettors prefer.

By using the odds converter you’re better placed to compare all odds on offer across bookmakers and exchanges, allowing you to find the best value quickly.

Different odds formats displayed on the odds converter

There are four main betting odds types which are all displayed in the odds converter tool above.

Decimal odds converter

The decimal odds format represents the potential return of a bet including stake. Decimals are more common as it’s the easiest format to compare prices between bookmakers and exchanges. Learn how to calculate your return with decimal odds.

Fractional odds converter

Fractional odds are most popular in the UK and particularly in horse racing but are becoming less favoured due to the difficulty comparing them against other odds formats. Learn how to calculate your return with fractional odds.

Percentage odds converter

Betting odds represent the chance an event will occur - the probability. Odds are simply an interpretation of those chances.

Seeing odds converted to their implied probability is more digestible when identifying if the odds offer value - Smarkets is one of the only platforms to allow you to bet with percentage odds. Learn how to calculate your return with percentage odds.

American odds converter

American odds, also known as moneyline or US odds, are expressed with either a positive or negative number.

A negative number indicates what you must bet to make £100 profit, while a positive number indicates how much you might profit if you bet £100. Learn more about American odds.

Now you have converted your betting odds, bet with the best odds which is what Smarkets provides with our industry-low flat 2% commission structure.

Trade now


Still not on Smarkets?

Trade sports, politics and current affairs with an industry-low 2% flat commission. All new customers get a £10 welcome bonus.

Join Smarkets