Free Bet Calculator

OddsGuard is geolocated to your market, so you only see prices for providers that are available in your region.

• Calculates and displays implied probability for each odds set
• Shows the "sharp" bookmaker's line for each market
• Identifies arbitrage opportunities across different sportsbooks
• Tracks line movement history with graphical charts
• Alerts for positive expected value (EV) bets based on model projections

Instantly convert between decimal, fractional, and American price formats with a single click.

Tracking line movements and market sentiment

See +EV alerts, find better lines, save money — automatically. OddsGuard works best in Extension mode — enable it once and we'll overlay the best price across 75+ sportsbooks on every page. Once the extension is on, OddsGuard stamps a live savings badge on every odds button — you'll see better prices before you tap. Don't leave money on the table — we scan every major sportsbook in real-time and route your parlay to the book paying out the most. One feed for every signup boost, deposit match, and reload offer across the books — claim them before they expire.

SINGLE BET CALCULATOR

Install the extension and complete every step to unlock the full OddsGuard experience. The days of paying $600 a month for clunky dashboards are over. Open your favorite sportsbook, spot the mathematical edge highlighted right on your screen, and lock in your bet before the line moves. Lock in bets before the line moves You no longer have to frantically refresh tabs or cross-reference screens just to find closing bet completely free bet no deposit app line value. OddsGuard gives you the sharpest insights without the heavy lifting — and without the monthly bill. The same 4-leg parlay can pay $10,000s more at a different sportsbook.

Comparison Tool	Number of Bookmakers	Notable Exclusions	Regional Focus
OddsPortal	200+	BetOnline (US)	Global
BetBrain	90+	Local Asian Books	Europe
Oddschecker	50+	Pinnacle (some regions)	UK, Australia

OddsGuard finds the best price across 75 books in real time — replacing tools that charge $200–$600/month.

What is a bet builder?

Punters usually only find themselves in situations where they are trying to convert odds between formats, for example whilst on holiday or traveling and betting outside their home countries. It is useful to be able to do, if you don’t have a conversion table or tool to hand. Converting decimal odds to fractional, take the decimal and subtract 1.00, so 5.00 – 1.00 = 4/1. However, if the decmial odds do not end in .00 then you will have to multiply the fraction to reach a non-decimal one. For example, 4.50 - 1.00 = 3.5/1, multiplied out to be 7/2 which is a normal odds presentation.

Save Time on Comparing Odds

For converting moneyline to decimal, when the moneyline price is positive divide it by 100 and add 1. Or for example, 5000 ÷ 100 + 1 = 51.00. When the moneyline price is negative, take 100 and divide it by the moneyline amount (first removing the minus sign), and add 1. So for a -400 price it would be 100 ÷ 400 + 1 = 1.25. For conversion of fractional odds to decimal take the first figure and divide it by the second figure then add 1.00. If you’re already using a sports betting system as a regular, simple and comfortable way of earning money bet best betting sites free bets no deposit to supplement your existing income, or if sports betting has already allowed you to give up your 9 ’til 5 job and your own personal system is consistently delivering, then there’s no need for you to read on any further.

Feedinco offers Football Odds Comparison that compares with betcompare the best Odds Comparison you can find. Football Odds Comparison is also free to use with various odds Comparison.

Follow the patterns of typical decimals odds such as 4.00 (3/1 or +300), 4.50 (7/2 or +350), 5.00 (4/1 or +400), 5.50 (9/2 or +450) and 6.00 (5/1 or +500) and you soon get a feel for how they translate into fractional or moneyline prices. When using decimal odds, you simply multiply your stake by the decimal odds and you will know exactly the return of a winning bet. As you might guess from the name this format is most popular in North America. Again, if the moneyline figure is positive it tells you what you can win on a successful bet with a £100 stake. Remember though, -100 is evens, so your returns are exactly double what you put down.

How to Convert Negative Moneyline Odds To Decimal

A £100 bet at bet betting offers casino a price of -100 returns £200, or £100 profit. With any negative moneyline figure beyond -100 the price is odds against and you stand to make less profit than the stake amount. With -105 moneyline (decimal 1.952 / fractional 20/21) odds your successful bet with a £100 stake win you £95.20 and so you walk away with £195.20 returns. With a -500 price (1.20 decimal or 1/5 fractional) your successful bet with a £100 stake gives you a £20 profit, so £120 total returns. Also, to note, sometimes you will hear prices or odds in North America referred to as ‘lines’. If not, and if you have a genuine desire to at least secure an additional income with the very real prospect of securing a main income stream, then read on. Our system is totally transparent and has a proven betting success percentage of 94.4%.

• Real-time odds updates across major sportsbooks
• Highlighting best prices for moneyline, spread, and totals
• Filters for specific sports, leagues, and bet types
• Side-by-side comparison table layout
• Push notifications for odds movements
• Direct links to bookmaker sites for placing bets
• Option to convert odds between decimal, fractional, and American formats

This is archived and available for all site visitors to view for free.

A trip through time - The history of sports betting odds

A 9/2 price in decimals is 5.50 and in moneyline it’s +450. 6/5 is a slightly bigger price than even money (1/1) and is expressed as 2.20 in decimal format or +120 in American format. If you placed a £10 bet on a 6/5 selection you would get a return of £22 (£12 profit) on a winning bet. 2/7 is an odds against price, meaning there is quite a high probability of winning according to the bookmaker and if ti wins you are going to make a much smaller profit. A successful £10 bet at 2/7 returns £2.86 on top of the stake, so total returns of £12.86.

Looking for the Best Basketball Odds?

This a 1.286 decimal odds price or -350 in American format. The most popular format outside the UK and Ireland, prices in decimals tell you what you stand to win if your bet is a successful one, including the stake being returned to you. Sometimes decimal prices are quoted to three decimal places, so if you place a £10 stake at 4.755 your total return on a correct bet is exactly £47.55, meaning you made a £37.55 profit. Although it takes a while to adjust from thinking in fractional odds to decimals they are becoming increasingly popular as they are easy to understand and accurately convey to the punter the exact return they stand to walk away with if their selection comes in. Decimal odds are also frequently used on betting exchanges. Our historic predictions and associated outcomes and rate of success are all evidenced so please take a look at the Archive of football tips. Sports betting is usually regarded as a source of entertainment you have to pay for.

Odds Calculator FAQs

Get the Browser Extension or Desktop App (that connects through your browser) OddsGuard works directly inside the sportsbooks you already use. No extra tabs, no manual lookups — just smarter betting. OddsGuard also overlays on Oddschecker, OddsShark, and VegasInsider — so you can spot the better price right where you already compare lines. Our browser extension shows you when better odds are available at other sports providers right on the pricing page. Click through the tabs to see it in action.

Price Converter

14 5-star reviews from bettors using OddsGuard today. Every active promo from every sportsbook — deposit bonuses, free bets, odds boosts — organized in one tab inside OddsGuard. OddsGuard provides everything you need to make informed decisions and save time and money. Compare prices across major providers in real-time to find the best value for your selections. Extension only loads on supported sports platform websites, so you don't have to worry about your data being shared with third parties. Unfortunately, nowadays most people are of this opinion.

Bookmaker	Avg. Football Margin	Avg. Tennis Margin	Welcome Bonus
Bet365	4.2%	5.1%	$1000
William Hill	4.8%	5.5%	$500
Unibet	4.5%	5.3%	$750
Betfair	3.9%	4.8%	$250

Progressivebetting.co.uk bucks this trend and we have a proven track record of success, our archive section provides just an example of this.

How do you calculate fractional odds?

So 1/2 becomes (1 ÷ 2) + 1.00 = 1.50. Or 2/1 becomes (2 ÷ 1) + 1.00 = 3.00. The concept of implied probability is worth keeping in mind when you try to assess the value of odds from a bookmaker. The odds are set based on the implied probability of the outcome, such as a horse winning a race, or a football player scoring a goal. A 9/1 (10.00 or +900) bet is ‘expected’ to be successful once in every 10 occasions, so the probability would be 10%.

How Does Comparing Odds Help Me Find the Best Bonuses?

A 1/4 (1.25 or -400) bet would be expected to be successful in four of every five attempts, it is heavily ‘odds on’ and the implied probability is 80%. You can make these types of calculation to assess the % chance you think your selection has of achieving the result you are betting on and see if you feel the odds are giving you enough value to make the bet. The No.1 place for Sports Betting Insight, Data & Content. Follow & track your favourite horses, jockeys & trainers Browse our catalogue of sports free bets and betting offers. OddsGuard overlays real-time prices from 75+ sportsbooks directly on the page you're already on. During the last 6 seasons in the English Premier League, no one team has gone more than 20 consecutive league matches without a draw.

Why use the oddschecker bet builder tool?

Automatically find and compare the best prices across 75 major providers so you don't overpay. Stay in control and keep your data anonymous. OddsGuard runs silently in your browser, automatically detecting relevant sites and prices without disrupting your browsing. Set your minimum savings thresholds for when to show better pricing. Show 👍 icon when the best prices are found. In fact, in most of these seasons, this sequence was as low as 14, 15, 16 and furthermore, most sequences without a draw generally end after a maximum of 5 or so games.

• Coverage of major sports like soccer, basketball, football, and tennis
• Specialized markets for esports, politics, and entertainment
• In-play/live betting odds comparison during events
• Futures and outright winner markets for tournaments and seasons
• Player prop bets and same-game parlays from supported books

This is an instant and powerful statistic/fact which clearly evidences the potential and success of applying a progressive system when correctly supported by a comprehensive and smart database, all of which is available on this site.

Tool	Moneyline	Point Spread	Over/Under	Props	Futures
Oddschecker	Yes	Yes	Yes	Yes	Yes
OddsPortal	Yes	Yes	Yes	Limited	Yes
The Action Network	Yes	Yes	Yes	Yes	No

Our archive section is totally transparent and essentially sells itself, so we have no interest nor indeed, any need for ‘marketing hooks‘ etc. Access to our site, containing invaluable stats and information about system to get you started, will not cost you anything so please take a tour of our site and register your membership for free. If what you see interests you and you’re serious about securing at least a good second income from sports betting, you can then subscribe for an incredibly small monthly or annual fee. Details of this are carried on the following link but to put this into perspective, it’ll cost you no more than the price of 2 beers or a glass of wine every month!.

• Detailed "how to use" guides and video tutorials
• Glossary explaining betting terms and odds formats
• FAQ section addressing common comparison questions
• Blog with articles on betting strategies and market analysis
• Support ticket system and live chat for technical issues

For this, you have full access to an unrivalled set of statistical information across global leagues, simple progression systems and tools for you to use and importantly, our own predictions (refer to archive for success) for upcoming matches based upon our years of experience and successful progression betting.