Polymarket Price and Probability Calculator

Calculator

Private browser calculation — values are not sent to us.

Calculating with the shown values…

Prefill from a link

Use the labeled field names as query parameters, such as ?cents=63. Only one finite value within each field’s displayed range is accepted; unknown, duplicate, and invalid parameters are ignored.

On this page

Convert cents and percentage probability. A displayed price is market-implied, not a guaranteed real-world probability.

Worked example

63¢ corresponds to 63%, or 0.63 as a decimal. Fees, spread, liquidity and available orders are separate considerations.

Related reading

What Is Polymarket? · How to Read a Market Page · Expected Value Calculator

Use the result in context

Read a market page before relying on a number

Check the exact question, resolution rules and available market activity before using a calculator result for a real-world decision.

Frequently Asked Questions

What does a 40¢ price represent?

It corresponds to a 40% market-implied probability, not a guaranteed real-world outcome.

Does the result tell me whether to trade?

No. It converts price to probability and does not assess the market rules, liquidity or your decision.