Polymarket odds: cents, probability, decimal and moneyline

It's all one number

Every market price on Polymarket is really a share price in cents, from 1¢ to 99¢, and each share pays $1 if it resolves your way. That price is the implied probability — a share at 25¢ means the market thinks there's about a 25% chance. Every other format is just that same number wearing different clothes:

• Cents — the raw share price, 1¢ to 99¢. What you actually pay.
• Prob % — the implied probability. Cents ÷ 100.
• Odds — decimal odds, the multiple you get back per unit staked. 1 ÷ price.
• ML — American moneyline, derived from the implied probability.

How to convert between them

Two small sums cover everything:

• Cents → probability: divide by 100. 25¢ → 25%.
• Cents → decimal: divide 1 by the price as a dollar figure. 0.25 → 1 ÷ 0.25 = 4.00.
• → moneyline: derived from the implied probability — favourites (over 50%) show a minus number, underdogs (under 50%) a plus.

Decimal is the most intuitive for payout: a share at 25¢ trades at 4.00, so a right answer returns four times your stake. As the price rises the decimal falls toward 1.00 — less to win, because the market thinks it's more likely.

A quick conversion reference

25¢

= 25% probability = 4.00 decimal = +300 moneyline — a clear underdog; being right pays about 3× your stake on top.

50¢

= 50% probability = 2.00 decimal = ±100 / EVEN moneyline — a coin flip; double your money if right.

80¢

= 80% probability = 1.25 decimal = -400 moneyline — a strong favourite; you stake a lot to win a little.

Setting the format in Desk

Each panel carries its own display setting, so you can read one market in cents and another in decimal at the same time:

1. Open the panel's Display menu.
2. Under Price, pick Cents, Prob %, Odds or ML.

The whole panel — ladder rungs, position, P&L — redraws in the format you chose. Nothing about the underlying trade changes; you're only changing how the number is written.

Mode presets and the language toggle

Mode sets a sensible default for the kind of market you're trading, which you can always override:

• Sports → decimal Odds with Back/Lay labels.
• Crypto and Financial → Cents with Buy/Sell labels.

Separately, Language controls what the two sides of a trade are called — Back/Lay, Buy/Sell, or No/Yes. That's purely wording: the action is the same whichever you pick. See trading basics for what those two sides actually do, and liability vs stake for how a laid price is staked.