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Betting basics · 10 of 36
Odds formats
In one line: American (+150, -110), decimal (2.50) and fractional (3/2) odds show the same price three ways.
Worked example
+150 is one price in three forms. In American, it wins $150 on $100. In decimal, it is 2.50, from 150 divided by 100, plus 1. In fractional, it is 3/2, because 150 over 100 reduces to 3/2. The minus side works the same way: -150 is 2/3 in fractional and 1.67 in decimal.
Illustrative prices, not a live quote.
What it is
Odds formats are three ways to show one price. American odds, like +150 or -110, show the profit on $100 for a plus price, or the stake needed to win $100 for a minus price.
Decimal odds show the total return on $1, so 2.50 returns $2.50, including your dollar. Fractional odds show profit per dollar staked, so 3/2 means $1.50 of profit on $1.
How to read it
To turn a plus price into decimal, divide it by 100 and add 1. +150 becomes 2.50. To turn a minus price into decimal, divide 100 by the number without its sign and add 1. -150 becomes 1.67.
Decimal minus 1 is the profit per dollar. Written as a fraction, that profit is the fractional price, so 2.50 becomes 3/2.
How it shows in Antic
Settings, under Betting, lets you show prices as American, decimal or multiplier. A multiplier is the decimal figure with an x, like 2.50x.
The Odds Converter in Calculators shows the decimal, the implied probability, the profit on $100 and the fractional form of any American price.
Common mistakes
Reading decimal 2.50 as 2.5 to 1. A $1 stake at 2.50 returns $2.50, which is $1.50 of profit.
Assuming 5/2 and 2.50 are the same price. 5/2 is 3.50 in decimal and +250 in American, which pays more than +150.