Odds Converter
Convert betting odds between decimal, fractional and American formats and see the implied probability.
- Decimal
- 2.500
- Fractional
- 3/2
- American
- +150
- Implied probability
- 40.00%
How it works
The same price can be written three ways. Decimal odds (2.50) show the total return per unit staked, fractional odds (3/2) show profit against stake, and American odds (+150 or -200) show profit on a 100 stake or the stake needed to win 100.
Pick the format you have, type the value and every other format updates at once, together with the implied probability: the win chance the price suggests, before any margin is removed.
Frequently asked questions
How do I convert fractional odds to decimal?
Divide the fraction and add 1. Odds of 5/2 are 5 / 2 + 1 = 3.50 in decimal.
What do positive and negative American odds mean?
Positive odds (+150) are the profit on a 100 stake. Negative odds (-200) are the stake needed to win 100. Values between -100 and +100 do not exist.
What is implied probability?
100 divided by the decimal odds. Decimal 2.00 implies 50%. Because bookmakers add a margin, the implied probabilities of all outcomes add up to more than 100%.
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