The actual probability of an outcome happening is usually slightly less than the implied probability, as betting odds factor in the bookmaker’s margin.

It gives you a rough idea of how likely something is to happen. Implied probability is the conversion of betting odds into a percentage. Adding your original $100 stake gives a total return of $900. For example, +800 gives $800 back from a $100 stake. Like fractional odds, they do not include your stake, so add this back at the end. A negative value of -200 says you must stake $200 to win $100. A positive value of +500 says you’ll win $500 for every $100 staked. Moneyline odds (AKA American odds) are shown as positive and negative numbers. You can change to decimal odds on your bookmaker settings page for ease of comparison. But which offers the higher return out of 11/4 and 13/5? As such, professional bettors vastly prefer decimal odds.īetting exchanges display their odds in decimal form, whereas online bookmakers favour fractional odds by default. Take decimal odds of 3.75 and 3.60 it’s clear that 3.75 gives a higher return. The main benefit of decimal odds is that they are much easier to compare at a glance. So, if you bet £1 on England to win the World Cup at odds of 10.00, you’ll get £10 back, which includes your £1 stake. You multiply your stake by the odds to get your total returns. Stakeĭecimal odds show how much a winning bet will return, including your stake. In the 9/1 example, you win £9 plus your original £1 stake you handed over to the bookmaker for a total return of £10. With fractional odds, you also get your original stake back. For example, fractional odds of 9/1 show that you stand to win £9 for every £1 staked. The number on the left is how much you win based on staking the amount on the right. These are the odds traditionally used by bookmakers and show you how much you win relative to your stake.

What does 300 mean in gambling