CP Price Desk
The math in every price, on the board.
Odds converter and implied chance
Convert American, decimal and fractional odds and see the implied chance in a price. Free, no sign-in, for adults 21+.
Enter a price
On the boardTurn on JavaScript to calculate.
A calculator shows the math in a price. It does not pick for you.
How it works
American to decimal
A plus price +a is 1 + a/100; a minus price -a is 1 + 100/a.
Back to American
(decimal - 1) × 100 from 2.00 up, else -100 / (decimal - 1). Fractional n/m is 1 + n/m.
Implied chance
1 divided by the decimal odds. It includes the book’s margin; the no-vig calculator strips it.
implied chance = 1 ÷ decimal odds- -110 → 1 + 100/110 = 1.909 decimal
- 1.909 is 10/11 fractional
- Implied chance 1 ÷ 1.909 = 52.4%
+100 and -100 are both 2.00, even money. A decimal below 1.01 or above 1000 is not read, and neither is a fraction with a zero. A whole number with no sign reads as American from 100 up (150 is +150) and as decimal below that (3 is 3.00). Decimal to fractional is the nearest fraction with a denominator up to 100.
Common questions
What is implied chance?
The chance a price would need to be fair for the book, 1 divided by the decimal odds.
Why do both sides of a game add to more than 100%?
The difference is the book's margin, called the vig; the no-vig calculator removes it.
Does a higher implied chance mean a better pick?
No. It means a shorter price. Our cards state a chance separately from the price.