Convert odds formats without changing the underlying probability
Different regions display the same market price in different formats. Converting the format does not create a better price; it makes equivalent quotes easier to compare.
Formula
Decimal = fractional numerator ÷ denominator + 1. Positive American = American ÷ 100 + 1. Negative American = 100 ÷ |American| + 1.Examples
- +150 American equals 2.50 decimal and 3/2 fractional.
- -200 American equals 1.50 decimal and 1/2 fractional.
Frequently asked questions
Which odds formats can I convert?
The calculator accepts decimal, American and fractional input and returns all three formats plus implied probability.
Does converting odds change the payout?
No. It changes only the display format. The underlying price and implied probability remain equivalent, subject to rounding.