Bet Odds Converter

Convert odds across major formats and understand the true probability behind each price.

Odds Conversion Calculator

Enter an odds value and select its format. The tool converts it to all other formats, shows implied probability, and optional profit if you add a stake.

Enter the price exactly as listed (e.g. 2.10, 5/2, +150 or -120).
Select the format of the number you entered.
Add a stake to see projected return and profit.
Used for formatting stake-based outputs.

Deep Dive

Converting odds clarifies the underlying probability, essential for detecting value and managing bankroll sensibly.

How Conversion Works

All formats map back to decimal odds, then probability is 1 / decimal. Fractional shows profit relative to stake; American shows profit units per 100 staked or stake needed to win 100.

Common Mistakes

  • Misreading negative American odds as positive.
  • Forgetting fractional odds exclude stake.
  • Using implied probability without adjusting for bookmaker margin.

Frequently Asked Questions

Regional preferences and historical traditions led to multiple representations of the same underlying probability.

No. You must compare implied probability with your assessed true chance. The gap is your edge (positive or negative).

Decimal to fractional conversion sometimes uses approximation; bookmakers may choose nearest conventional fraction.