Betting Odds Converter: All 7 Formats Instantly (2026)
Type one price and read it back in all seven formats at once. Decimal, fractional, American moneyline, implied probability, Hong Kong, Indonesian and Malay, plus a payout calculator and an honest value check that compares the price to your own estimate.
Enter your odds
Europe and most exchanges. The total return per 1 unit staked, stake included.
Payout calculator
Total return includes your stake. Profit is the winnings on top.
All formats
This is the chance the price implies before margin. It does not mean the bet is fair.
Value check
Enter the win chance you actually believe this outcome has. The tool compares it to the price and shows your edge. This is only as accurate as your own estimate, it is not a prediction.
Odds conversion table
A quick reference for the most common prices across every format. Bookmark it for fast lookups when you are line shopping.
| Decimal | Fraction | American | Probability | Hong Kong | Malay |
|---|---|---|---|---|---|
| 1.20 | 1/5 | -500 | 83.3% | 0.20 | +0.20 |
| 1.50 | 1/2 | -200 | 66.7% | 0.50 | +0.50 |
| 1.83 | 83/100 | -120 | 54.6% | 0.83 | +0.83 |
| 1.91 | 91/100 | -110 | 52.4% | 0.91 | +0.91 |
| 2.00 | 1/1 | +100 | 50.0% | 1.00 | +1.00 |
| 2.50 | 3/2 | +150 | 40.0% | 1.50 | -0.67 |
| 3.00 | 2/1 | +200 | 33.3% | 2.00 | -0.50 |
| 3.50 | 5/2 | +250 | 28.6% | 2.50 | -0.40 |
| 4.00 | 3/1 | +300 | 25.0% | 3.00 | -0.33 |
| 5.00 | 4/1 | +400 | 20.0% | 4.00 | -0.25 |
| 6.00 | 5/1 | +500 | 16.7% | 5.00 | -0.20 |
| 8.00 | 7/1 | +700 | 12.5% | 7.00 | -0.14 |
| 11.00 | 10/1 | +1000 | 9.1% | 10.00 | -0.10 |
| 21.00 | 20/1 | +2000 | 4.8% | 20.00 | -0.05 |
| 51.00 | 50/1 | +5000 | 2.0% | 50.00 | -0.02 |
How the conversions work
Every format is just a different way of writing the same decimal price. Here is the math, in plain language.
Decimal to probability
P = (1 / D) x 100
Divide one by the decimal price, then read it as a percent. 2.50 gives 40%.
Fraction to decimal
D = (N / M) + 1
Divide the fraction and add one for the stake. 3/2 gives 1.5 + 1 = 2.50.
Decimal to American
D >= 2: (D-1) x 100 D < 2: -100 / (D-1)
Favourites get a minus, underdogs a plus. 2.50 becomes +150, 1.50 becomes -200.
American to decimal
+A: A/100 + 1 -A: 100/abs(A) + 1
Turn the moneyline back into a multiplier. +150 gives 2.50, -200 gives 1.50.
Betting odds formats explained, and how to convert them
Odds are just probability wearing different clothes. In 2026 the same price can show up as 2.50, 3/2, +150, 40% or a Malay minus, depending on the bookmaker and the country. This free odds converter on toolsgambling.com turns any of those into all the others instantly, so you never misread a line again.
What an odds converter actually does
Every odds format encodes one number: the implied probability of an outcome, marked up by the bookmaker margin. A converter strips the formatting away, finds that underlying decimal price, and rewrites it in whatever format you need. Nothing about the bet changes, only the notation.
That matters because lines are quoted differently around the world. A US sportsbook shows +150, a UK shop shows 6/4, a European site shows 2.50, and an Asian exchange might show 1.50 Hong Kong or -0.67 Malay. They are all the exact same price. Reading them as if they differ is one of the fastest ways to leave money on the table.
I built this after years of line shopping across US and European books. The moment I stopped mentally converting +110 to decimal in my head and let a tool do it, my closing-line numbers got noticeably more honest.
Why bettors convert odds
Four reasons come up again and again, and all of them protect your bankroll.
Line shopping across formats
The best price for one outcome might sit at an American book and a European exchange at the same time. To compare them you need them in one shared format. Decimal is the cleanest for this because you can multiply and divide it directly.
Reading implied probability
Converting to probability tells you the chance the market is pricing in. If a price implies 40% but you think the true chance is 50%, that gap is where value lives. The value check on this page does that comparison for you.
Sizing bets correctly
Staking systems like the Kelly Criterion run on decimal odds and probabilities, not fractions. Convert first, then plug the numbers into a staking tool so the math is clean.
Spotting the margin
When you add up the implied probabilities of every outcome in a market, the total above 100% is the bookmaker margin. You can only see it once all the prices are in the same format.
How each format is built
Decimal odds are the multiplier on your total return. At 2.50, a 10 stake returns 25, so your profit is 15. The implied probability is one divided by the decimal, here 1 divided by 2.50 is 40%.
Fractional odds quote profit against stake. 3/2 means three profit for every two staked, which is 1.5 profit per 1, so the decimal is 1.5 plus 1, or 2.50. Evens, written 1/1, is decimal 2.00 and a 50% implied chance.
American odds split at evens. A positive number is the profit on a 100 stake, so +150 returns 150 profit. A negative number is the stake needed to win 100, so -200 means risk 200 to win 100. Hong Kong, Indonesian and Malay are Asian variants of the same idea, which the converter handles automatically.
How to use the odds converter on toolsgambling.com
It is built for speed. You can run a conversion in under five seconds.
- 01
Choose your input format
Use the format selector at the top of the calculator. If you mostly bet US lines, leave it on American. European bettors usually want decimal.
- 02
Type the price
Enter your odds in the big input. The tool validates as you type, so a malformed value like a -50 moneyline is flagged instead of silently breaking.
- 03
Read all seven formats
The results panel lists decimal, fractional, American, implied probability, Hong Kong, Indonesian and Malay together, with your input tagged.
- 04
Add a stake
Type a stake into the payout box to see your total return and profit at that price.
- 05
Test for value
Enter the win chance you genuinely believe the outcome has. The tool compares it to the price and tells you whether there is a positive-expected-value edge, honestly labelled as an estimate.
Implied probability and the bookmaker margin
Implied probability is the single most useful conversion. A price of 2.00 implies 50%, 1.50 implies 66.7%, and 4.00 implies 25%. Those are the market odds before any judgement of your own.
Add up the implied probabilities for every outcome in a two-way market and you will usually get a number above 100%. A typical -110 against -110 line totals about 104.8%, and that 4.8% over fair is the margin, also called the vig or juice. The lower the margin, the better the price. The margin calculator and no-vig tools take this further.
Worked examples
Three quick conversions you will hit in real betting.
Translating a US line for a European friend
Your book shows -200 on a favourite. Type -200 with American selected and you get decimal 1.50, fraction 1/2, and 66.7% implied. Now anyone reading any format understands the same price.
Finding the value in a longshot
An underdog sits at +600, which is decimal 7.00 and a 14.3% implied chance. If your model says the true chance is 18%, the value check shows a positive edge of about 26%. That is the kind of spot worth a small, disciplined stake.
Comparing two books quickly
Book A offers 11/4, Book B offers +280. Convert both: 11/4 is decimal 3.75, +280 is decimal 3.80. Book B is the better price, by a gap you would never have spotted across two formats.
Common mistakes to avoid
Format confusion costs more than people admit. Watch for these.
Treating implied probability as the real chance
The price tells you what the market thinks plus margin, not what will happen. A 40% implied price is not a 40% guarantee, and it is inflated by the vig.
Misreading American minus signs
Plenty of newcomers think -200 is a bigger underdog than +150. It is the opposite. The minus means favourite. Convert to decimal and 1.50 against 2.50 makes the favourite obvious.
Comparing prices in different formats by eye
11/4 and +280 look unrelated, but they are nearly identical. Always convert to one format before deciding which book is best.
Ignoring the margin
A great-looking price at a high-margin book can be worse than an average price at a sharp one. Convert all outcomes and total the probabilities before you trust a number.
Odds glossary
The terms you will meet most often, in plain English.
Key betting odds terms
- The total return per 1 unit staked, stake included. 2.50 returns 2.50 for every 1 risked.
- Profit relative to stake, written as a fraction. 5/1 returns five profit per one staked.
- Moneyline format. Positive numbers show profit on a 100 stake, negative numbers show the stake to win 100.
- The win chance encoded in a price, found as one divided by the decimal odds.
- The amount by which the total implied probability of a market exceeds 100%. Also called vig, juice or overround.
- A bet where your estimated true probability is higher than the probability implied by the price.
- The average result of a bet over the long run, positive when your edge beats the price.
- Asian formats. Hong Kong is net decimal, Indonesian is American over 100, and Malay caps payout at 1 with favourites positive and underdogs negative.
Decimal odds
Fractional odds
American odds
Implied probability
Bookmaker margin
Value bet
Expected value
Hong Kong, Indonesian and Malay odds
Note
These definitions describe how prices are written. None of them tell you whether a bet will win. Always pair odds reading with bankroll discipline.
Free betting tools to use next
On toolsgambling.com you can use the odds converter for free, just like all our other tools. Once you have your price in decimal, these pair naturally with it.
Bet responsibly
Converting odds sharpens your reading, but no tool removes the house edge or guarantees a win. Set limits, never chase losses, and if betting stops being fun, get free confidential support at BeGambleAware.org.
Evgeniy Volkov
Fullstack developer with a background in mathematics. I build the calculators and game-style tools on ToolsGambling with Pixi.js and modern web tech, and every result uses transparent probability formulas you can verify yourself.
Odds converter FAQ
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