Odds Converter Calculator

Convert odds between fractional, decimal, and American formats using our user-friendly calculator. Simply input the odds and let our tool handle the rest for you.

Betting Odds Converter Calculator
Convert Odds from:
Fractional Odds:
American Odds:
Implied Probability

What Is Betting Odds?

Betting odds serve as a representation of the likelihood of a particular outcome in an event. They are also used to determine the potential profit on a bet relative to the stake. Different parts of the world favor different formats of odds. Here’s a closer look.

Decimal Odds

The decimal format is popular in continental Europe, Australia, New Zealand, and Canada. They represent the total return from a winning bet, including the stake. The higher the decimal number, the less likely the outcome is expected to be.

Example: If you place a bet of $10 at a decimal odds of 1.50, you could potentially return $15 ($5 profit + $10 stake).

Fractional Odds

The fractional format is widely used in the UK and Ireland. They show the potential profit relative to the stake, rather than the total return. The fraction consists of a numerator (potential profit) over a denominator (stake).

Example: If you have odds of 5/1, for every $1 you bet, you could win $5. So, a $10 bet could yield a profit of $50.

American Odds

Also known as “moneyline odds”, American odds are popular in the United States. Positive odds indicate how much profit you’d make on a $100 bet, while negative ones show how much you’d need to bet to make $100.


+100 means if you bet $100, you could win an additional $100.

-150 means you’d need to bet $150 to win $100.

How To Use Odds Converter Calculator?

To use the Calculator, simply:

  1. Select the format in which you will enter the odds (decimal, fractional, or American).
  2. Enter the factor in the selected format.
  3. The calculator instantly displays the converted odds in all formats and the implied probability of winning.
  4. Click on the Restart button to re-collect the data

This tool allows you to understand at a glance the potential profitability of different odds fo


Let’s take a deeper look using the Fractional format of 3/1 and determine its Decimal and American equivalents. When you enter “3/1” into the Calculator:

  • The Decimal format would be 4.00. This means that for every $1 you bet, your total return (including your initial stake) would be $4. So, if you bet $10, you would get back $40, resulting in a profit of $30.
  • The American format would be +300. This indicates that for every $100 bet, you could potentially profit $300. If you were to bet $10 in this situation, your profit would be $30.

Understanding these conversions can be vital in assessing potential gains across different betting platforms and regions.

Betting Odds Conversion Reference

For those who appreciate a quick reference, rather than toggling with a calculator, we’ve compiled a handy table for you.

This table showcases the conversions among the most frequently encountered fractional, decimal, and American odds.

This chart is a go-to guide for those swift conversions when assessing betting opportunities. Remember, the odds are just a representation of probability; always place bets judiciously.

Which Odds Format is the Ideal Choice?

None of the formats inherently outshines the others in practicality. They are merely varied lenses through which the same data is viewed. Hence, no single format is universally superior.

The “best” format largely orbits around individual preferences influenced by two pivotal factors. Firstly, the offerings of your go-to bookmakers play a role. While many platforms grant the liberty to pick your preferred format, it’s noteworthy that, for instance, American odds are rarer on European and UK platforms. So, the choice often oscillates between decimal and fractional for many users.

The second factor, quintessentially, is familiarity. The format that feels most intuitive, typically rooted in personal experience, usually emerges as the favorite. But in essence, there’s no need for overthought. No format reigns supreme objectively. The key is to align with what feels right for you, confident that our tools will always make odds comprehension a breeze.


Why are there different odds formats?

Different regions developed their own systems based on historical and cultural preferences. Over time, as betting became more globalized, understanding the different formats became essential.

Is there an advantage to using one odds format over another?

No, the format is purely a matter of preference. Regardless of the format, the potential return on a bet remains the same.

Can I use the Calculator for multiple sports?

Yes, the calculator is versatile and can be used for any sport or event where odds are provided.

Why might odds for the same event vary across different betting platforms?

Odds can be influenced by several factors, including the amount of money placed on a particular outcome, platform-specific analyses, and even regional biases. Different platforms might have slightly varied measures due to their risk management strategies and the volume of bets they handle.

How do changes in real-time events, like player injuries or weather, affect odds?

Odds can shift in real-time due to unforeseen circumstances like player injuries, changes in weather conditions, or other unpredictable events. These factors can influence the perceived probability of an outcome, leading bookmakers to adjust measures to reflect new information. Bettors should always be vigilant and stay updated on such changes, as they can impact betting decisions.