Model │ Math · Free tool
Odds Converter
A price written four ways. Type into any field, American, decimal, fractional, or implied probability, and the rest convert as you go.
A whole number, +100 or higher, or -100 or lower.
A number greater than 1, the total return per 1 staked.
Two whole numbers as profit / stake, e.g. 3/2.
A percentage above 0 and below 100.
Edit any field, the other three convert as you type.
The four formats
Every line below is the same bet, a price that pays even money. The four notations are just regional dialects for one idea: what you risk, and what it returns.
- Decimal
- The total returned per 1 unit staked, the stake included. 2.00 doubles your money. Standard across Europe and Australia, and the easiest format to do math with.
- American
- Built around 100. A positive price is the profit on a 100 stake; a negative price is the stake needed to profit 100. The negative side is the favourite.
- Fractional
- Profit relative to stake, 3/2 returns 3 profit for every 2 risked. Traditional in the UK and Irish racing.
- Implied probability
- The same price read as a break-even win rate, how often the bet must land just to come out even. It is the most useful view: it turns a price into a claim about the world.
One catch. Add up the implied probabilities of both sides of a real market and the total clears 100%. That excess is the bookmaker's margin, the vig. Stripping it out is its own tool, Vig & Fair Odds.