Odds converter
Enter a price in any one format. The other three, the implied probability and the return on your stake update as you type.
What the bookmaker keeps
Add the prices a bookmaker offers on every outcome of the same market. The implied percentages should total 100%. Anything above that is the margin — the built-in edge you are paying, whoever wins.
Implied total104.8%
Bookmaker margin4.6%
A margin of 4.6% means that, on average, that share of everything staked on this market stays with the bookmaker. It is not a fee you can avoid by picking well — it is priced into every outcome.