Price to Implied Probability

Convert a prediction market price into an implied probability percentage.

How it works

What to enter

  • Price scale: choose 0 to 100 (common on prediction markets) or 0 to 1 (decimal).
  • Market price: enter the current price you are referencing.
  • Optional bid and ask: if you have an order book, enter both bid and ask to see an implied probability range.
  • Reference price: choose Mid (average of bid and ask), Ask (more conservative for entering long), or Bid (more conservative for entering short).

Example

Price scale 0 to 100, market price 63.5 → implied probability 63.5%.

Tip

  • If you only see one price, use Market price.
  • If you see bid and ask, use Mid for a neutral reference, and Ask or Bid for conservative comparisons.