Odds Converter

Convert Decimals, Fractions, American and Implied Probability With Our FREE TO USE Tool

Hello and welcome to our FREE odds converter tool!

Odds Converter

Convert fractional, decimal, American, and implied probability odds instantly.

Let's be honest - most of us aren't exactly maths geniuses (I know I'm not!). And nothing kills the buzz of a bet faster than fiddling with a calculator trying to figure out what those odds actually mean for your wallet.

That's where our free odds converter tool comes in. No head-scratching, no guesswork - just quick and easy conversions.

Switch fractional odds to decimal - and vice versa. Check the moneyline (American) equivalent or view the implied probability in seconds.

Simply pop your odds into one box, and the other three will instantly update like magic.

How To Use Odds Converter Tool

  1. Enter your odds: Click in any of the four fields (fractional, decimal, American or implied probability) and enter the odds you want to convert.
  2. Get results: As you type, the tool will automatically calculate and display the converted odds in the other three fields. Make sure to include a forward-slash for fractional odds.
  3. Start again: Need another conversion? Simply clear the field you were typing in and all other fields will clear as well, allowing you to begin another entry!

Odds Conversion FAQs

Why Use An Odds Converter Calculator?

To make your life a whole lot easier and make your overall betting experience far simpler!

What Is Implied Probability?

Implied Probability is a way of expressing odds as a percentage. It represents the likelihood of a specific outcome according to the bookmaker's odds. For example, fractional odds of 2/1 have an implied probability of 33.3%.

Do Betting Sites Offer Odds Conversions?

Almost all UK betting sites offer users the chance to convert fractional and decimal odds. But only a select few also allow users the option to go with moneyline odds.

Is There A Right Type Of Odds To Use?

No, it's all down to personal preference, and it's why most UK betting sites offer their users the chance to interchange between decimal and fractional odds at their own free will.

Can I Convert Odds For Any Sport?

Yes! The conversion rules are universal across all sports. Whether you're betting on more traditional markets like football or horse racing, or more niche sports such as water polo or chess - the formula works the same.

How To Convert British Odds To Probability?

To work out the implied probability from fractional odds, take the bottom number (the denominator) and divide it by the total of both numbers added together. For example, odds of 5/1 mean you divide 1 by 6, which gives you a probability of about 16.7%. Alternatively, use our free tool above that can convert it for you!

Converting Odds On Betting Sites

While we're delighted you've come to our site to use our odds converter tool, it may not always be necessary.

Most UK betting sites offer users the chance to interchange between fractional and decimal odds at the click of a button - and some even give the option of American odds too.

Here's a list of some of the more popular UK betting sites and how to change odds on their platform 👇.

BookmakerDefault OddsHow To Convert
Bet365Fractional OddsProfile > Preference > Odds Display
Paddy PowerFractionalGeneral Settings > Settings > Odds Preference
Sky BetFractionalLogin > Bottom Of HomePage > Odds Display
SmarketsDecimalAccount Settings > General Settings > Select Odds Format
BetfairFractionalProfile > Settings & Details > Odds Display
BetfredFractionalUseful Links > Settings > Odds Type
SpreadexDecimalHomepage > Fixed Odds Display
LadbrokesFractionalProfile > Settings > Betting Settings > Set Odds
ParimatchFractionalProfile > Account Settings > Choose Format

Odds Formats Explained

You've got your conversion, but what does it all REALLY mean? Whether you're a seasoned pro or dipping your toe into sports betting for the first time, understanding odds formats is key to unlocking the full betting experience.

How else can you work out your potential winnings?!

Fractional Odds (e.g., 5/1, 2/5)

The classic BLT of UK betting: fractional odds. Every British punter has seen them, and the easiest way to explain is this — the first number shows how much you could win, the second number shows how much you need to stake.

  • Example: Odds of 5/1 eans for every £1 you bet, you'll win £5 if you're right. For the big guns, that means a £100 bet returns a whopping £500

💡 Fractional odds are seen as perfect for quick mental calculations once you get used to them.

Decimal Odds (e.g., 2.50, 1.80)

More regularly seen across Europe and Australia, decimal odds are straightforward. Simply multiple your stake by the decimal to see your total return.

  • Example: If you bet £10 on odds of 2.50, you'll get £25 back (£15 profit + your £10 stake)

💡 Decimal odds are simple to read and require little mental mathematics once you understand the basics.

Moneyline / American Odds (e.g., +150, -200)

Mostly seen in the US (hence the name). Positive numbers show how much profit you'd make on a £1o0 stake, negative numbers show how much you need to stake to win £100.

  • Example: Odds of +150 means a £100 bet wins £150 profit. Odds of -200 means you need to bet £200 to win £100

💡 A bit more tricky to get to grips with initially, but it quickly begins to make sense with some practice.

Implied Probability (%)

Not a bet format per se, but it's super handy to know. It tells you the chance of something happening according to the odds.

  • Example: Odds of 2/1 (3.0) mean an implied probability of 33.3% - roughly a one-in-three chance of winning.

💡 Could be a secret weapon in your betting arsenal as understanding it can help you spot when the bookies might be under - or overestimating outcomes.

Odds Conversion Table

Need to look at multiple conversions all at the same time? We've got you covered as well, with this neat conversion table covering some of the most common betting odds.

FractionalDecimalMoneylineImplied Probability
1/1001.01-1000099.01%
1/101.10-100090.91%
1/51.20-50083.33%
1/41.25-40080.00%
1/31.33-30075.00%
2/51.40-25071.43%
4/91.44-22569.44%
1/21.50-20066.67%
8/151.53-18865.36%
4/71.57-17563.64%
8/131.62-16261.73%
4/61.67-15060.00%
8/111.73-13857.97%
3/41.75-13357.14%
5/61.83-12054.55%
1/12.00+10050.00%
6/52.20+12045.45%
7/52.40+14041.67%
2/13.00+20033.33%
3/14.00+30025.00%
5/16.00+50016.67%
10/111.00+10009.09%
20/121.00+20004.76%
25/126.00+25003.85%
50/151.00+50001.96%
100/1101.00+100000.99%

What Next?

Hopefully you've found exactly what you were looking for on this page - now the fun part is actually putting that knowledge to use. And that's where we come in!

At MyBettingSites, our main goal is to make it easy for UK punters to find the best betting sites for whatever sport you love most. From the roar of the Premier League ⚽️ and the thrill of Cheltenham 🐎, to the drama at the Ally Pally 🎯 and the chaos of cricket 🏏 - we've reviewed, compared and ranked them all.

Whether you're after the biggest welcome bonuses, the most user-friendly betting app, or low deposit betting sites, we'll point you in the right direction.

👉 Check out our latest guides and rankings to make sure you're always betting with the bookies that give you the best value.

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