There are generally three possible methods of stating odds that most bookmakers use. These are decimal, fractional, and American moneyline.

Converting the various betting odds to probability percentages helps make it easier to understand.

The converter table below illustrates the three types of odds with the respective probability percentages.

## Betting Odds Converter Table

Decimal Fraction American (Moneyline) Implied Probability
wdt_ID Decimal Fraction American (Moneyline) Implied Probability
1 1.14 1/7 -700 87.5%
2 1.17 1/6 -600 85.7%
3 1.2 1/5 -500 83.3%
4 1.22 2/9 -450 81.8%
5 1.25 1/4 -400 80.0%
6 1.29 2/7 -350 77.8%
7 1.33 1/3 -300 75.0%
8 1.36 4/11 -275 73.3%
9 1.45 4/9 -225 69.2%
10 1.5 1/2 -200 66.7%
11 2 1/1 100 50.0%
12 2.25 5/4 125 44.4%
13 3 2/1 200 33.3%
14 4 3/1 300 25.0%
15 10 9/1 900 10.0%
16 10.99 10/1 1000 9.1%
17 20.83 20/1 2000 4.8%
18 50 50/1 5000 2.0%
19 100 100/1 10000 1.0%
20 1000 1000/1 100000 0.1%

The formulas for converting the betting odds to implied probability percentages are below:

## Convert to Probability

Convert to Implied Probability Formula
wdt_ID Convert to Implied Probability Formula
1 Convert decimal odds to probability 1 / decimal odds
2 Convert fractional odds to probability denominator / (denominator + numerator)
3 Convert plus moneyline to probability 100 / (plus moneyline odds + 100)
4 Convert minus moneyline to probability minus moneyline / (minus moneyline - 100)

The formulas for converting the implied probability percentages to betting odds are below:

## Convert to Odds

Convert to Odds Formula
wdt_ID Convert to Odds Formula
1 Convert probability to decimal odds 1 / probability percentage
2 Convert probability to fractional odds (1 / probability percentage) - 1
3 Convert probability to plus moneyline odds (1-implied probability) / implied probability x 100
4 Convert probability to minus moneyline odds -(implied probability / (1-Implied probability)) x 100