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Prediction market price → probability

Convert prices

Enter prices in cents (1–99). Leave the draw empty for 2-outcome markets.
Normalised · A61.8%
OutcomePrice (¢)ImpliedNormalisedDecimal equivalent
Outcome A———
Draw———
Outcome B———
Sum of prices —Gap from 100¢ —

One contract, step by step

  1. You pay 63¢ for one contract on outcome A.
  2. If A happens the contract pays 100¢; if not, it pays 0.
  3. So the price 63¢ is a 63% implied probability, the same as decimal odds of 1.59.

Live examples from upcoming matches

Current displayed prices for the most-followed upcoming matches, converted. Updated every few minutes.
Updated 10-31 22:34
MatchPricesSumNormalised favourite
Liverpool FC – Arsenal FCPremier League · Kalshi33¢ · 28¢ · 37¢98¢Arsenal FC37.8%
Real Racing Club – Real MadridLa Liga · Polymarket8¢ · 11¢ · 80¢99¢Real Madrid80.8%
Como 1907 – Venezia FCSerie A · Kalshi75¢ · 14¢ · 9¢98¢Como 190776.5%
SC Braga – FamalicaoPrimeira Liga · Kalshi56¢ · 26¢ · 17¢99¢SC Braga56.6%
Bills – RavensNFL · Polymarket61¢ · 38¢99¢Bills61.6%
Rockets – ThunderNBA · Polymarket57¢ · 42¢99¢Rockets57.6%
Bengals – TitansNFL · Polymarket86¢ · 13¢99¢Bengals86.9%
CA Boca Juniors – CA River PlateLiga Profesional · Polymarket42¢ · 31¢ · 27¢100¢CA Boca Juniors42.0%

How it works

  1. Implied probability = price in cents ÷ 100. Example: 63¢ → 63%.
  2. The prices of all outcomes rarely add up to exactly 100¢. The gap comes from the spread between buyers and sellers and from rounding.
  3. Normalised probability = price ÷ sum of all prices. Example: 63¢ and 39¢ add up to 102¢, so A = 63 ÷ 102 = 61.8%.
  4. Decimal equivalent = 100 ÷ price. Example: 40¢ → 2.50.

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Frequently asked questions

Is a Polymarket or Kalshi price the same as a probability?

Roughly, yes. A contract settles at 1 unit if the outcome happens and 0 if it does not, so a 63¢ price means traders as a group price the outcome at about 63%.

Why do Yes and No prices add up to more than 100¢?

The displayed prices come from an order book with a gap between the best buy and sell prices, and they are rounded. Dividing each price by the sum gives a normalised probability that adds up to 100%.

Which price does this page use for live examples?

The price each platform shows on its own market page for that outcome, rounded down to a whole number, the same figure shown on our match pages.

How do I compare a prediction-market price with decimal odds?

Divide 100 by the price in cents. A 40¢ contract is equivalent to decimal odds of 2.50; our odds converter does the other formats.

Does a high price mean the outcome is certain?

No. An 80¢ price still means about a one-in-five chance that it does not happen. Prices are a market estimate, not a guarantee, and past performance does not indicate future results.

See the full data on Tips