Boxing Odds Checker and Fight Margin Calculator for Three-Way Prices

How to check boxing odds with the tool

This boxing odds checker works on the prices you bring to it. Open the fight result market for a bout at your bookmaker and copy the three prices into Bookmaker 1: the red corner, the draw and the blue corner. The boxes accept fractions such as 4/9 or 4-9, the word Evs and decimals such as 1.44, so you can copy whatever the screen shows. The name fields for the book and the two corners are optional and only change the labels. No bookmaker names are built in, and none is suggested.

As you type, the result panel recalculates. It shows the book’s margin as a headline, then a table with each outcome’s price, decimal, implied chance, fair chance and fair odds. The checkbox Compare a second bookmaker adds a second set of three boxes, and once both books are complete a side-by-side table marks the longer price on each outcome. That is the whole job of an odds checker boxing fans can run on a phone at ringside or at home: not to find a price for you, but to show what the prices you have found actually say.

If one of the three prices is missing, the panel asks for all three rather than showing a margin on two. Leave only the draw empty and it explains that a boxing fight-winner market usually has three outcomes, and that a market with no draw should be checked for how it settles a draw. A price it cannot read is marked with “Use a price like 9/2, Evs or 5.50.”, and nothing is calculated from it.

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Three-way prices: fighter, draw, fighter

A boxing fight result in the UK is normally a three-way market: the red corner, the blue corner or a draw on the judges’ cards. The draw is the least likely of the three, and bookmakers usually price it long, often at 20/1 or more on a fight with a clear favourite. That long price still carries its share of the margin, which is why a draw price can look generous and imply more than the chance you would give it. If a bookmaker ever prices the draw at Evs or shorter, the tool still calculates the book but adds the warning “That is an unusually short draw price — check the market.”

The calculator turns each price into an implied chance by converting it to a decimal and dividing one by it. The example favourite at 4/9 is 1.4444 as an exact decimal, shown as 1.44, and implies 69.23%. The draw at 20/1 is 21.00 and implies 4.76%. The underdog at 7/4 is 2.75 and implies 36.36%. Those three add up to 110.36%, which is more than the 100% a real fight has to divide between its outcomes. The extra 10.36% is the bookmaker margin on this fight.

Fair odds with the margin removed

To see what the prices would be without that margin, the tool divides each implied chance by the book total. The favourite’s 69.23% becomes 62.73%, the draw’s 4.76% becomes 4.32%, and the underdog’s 36.36% becomes 32.95%. Those fair chances add up to 100.00%. Turned back into prices, they are 1.59, 23.17 and 3.03 in decimal, against the 1.44, 21.00 and 2.75 quoted. The gap between each pair is the part of that outcome’s price the bookmaker keeps.

This is the proportional method: every outcome gives up margin in proportion to its own implied chance. It is the most common way to remove a margin and the one used on every tool on this site. Other methods load more of the margin onto the long prices, which would make the draw and the underdog slightly longer and the favourite slightly shorter than the fair odds shown here. None of them turns a fair price into a forecast. The fair odds describe what this bookmaker’s prices imply, not what will happen in the fight.

Two bookmakers side by side

The second book in the example prices the same fight at 1/2 for the favourite, 25/1 for the draw and 13/8 for the underdog. 13/8 is exactly 2.625, shown as 2.63, and the calculation keeps the exact value. Those prices imply 66.67%, 3.85% and 38.10%, a book of 108.61% and a margin of 8.61%, so the second book keeps less on this fight than the first. Its fair odds come to 1.63, 28.24 and 2.85.

The side-by-side table then compares the outcomes one at a time and marks the higher decimal with “▲ longer price”. In the example the favourite is longer at the second book (1/2 against 4/9), the draw is longer at the second book (25/1 against 20/1), and the underdog is longer at the first book (7/4 against 13/8). Where both books show the same price the table says “same” and marks neither. The lesson is that the book with the smaller total margin is not automatically longer on the outcome you care about.

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What the checker does not do

The tool does not fetch prices, so it is only as current as the numbers you type in, and fight prices can move quickly around the weigh-in and on fight night. It works on the three-way fight result; a two-way market with no draw is not given a margin, and round, method and points markets belong in the round betting calculator. It takes no stake, shows no return and gives no opinion on who will take the fight. What the numbers cannot tell you, such as styles, reach and recent activity, is the subject of our boxing betting tips guide. Every fight market, from the result to method of victory, is explained in the boxing betting markets guide, and the steps from choosing a licensed bookmaker to reading a first price are in our beginner’s guide to boxing betting. The other calculators are on the tools page, and the full guide index starts on our homepage.