Polymarket Odds Cheat Sheet: Price to Probability, American and Decimal Odds (Printable)

A Polymarket price is the market's implied chance: 60¢ means 60%, which pays $66.67 profit on a $100 stake if it wins and equals -150 in American odds or 1.67 in decimal odds. Taker fees raise the break-even point a little: at the 5% category rate a 50¢ share needs 51.25% to break even. The table below covers every common price; print it or keep it open while you trade.

Prices, chances and odds

Price	Implied chance	Profit on $100	American	Decimal	Fractional	Break-even, 4% fee	Break-even, 5% fee	Break-even, 7% fee
1¢	1%	$9,900.00	+9900	100.00	99/1	1.04%	1.05%	1.07%
2¢	2%	$4,900.00	+4900	50.00	49/1	2.08%	2.10%	2.14%
3¢	3%	$3,233.33	+3233	33.33	97/3	3.12%	3.15%	3.20%
5¢	5%	$1,900.00	+1900	20.00	19/1	5.19%	5.24%	5.33%
10¢	10%	$900.00	+900	10.00	9/1	10.36%	10.45%	10.63%
15¢	15%	$566.67	+567	6.67	17/3	15.51%	15.64%	15.89%
20¢	20%	$400.00	+400	5.00	4/1	20.64%	20.80%	21.12%
25¢	25%	$300.00	+300	4.00	3/1	25.75%	25.94%	26.31%
30¢	30%	$233.33	+233	3.33	7/3	30.84%	31.05%	31.47%
35¢	35%	$185.71	+186	2.86	13/7	35.91%	36.14%	36.59%
40¢	40%	$150.00	+150	2.50	3/2	40.96%	41.20%	41.68%
45¢	45%	$122.22	+122	2.22	11/9	45.99%	46.24%	46.73%
50¢	50%	$100.00	+100	2.00	1/1	51.00%	51.25%	51.75%
55¢	55%	$81.82	-122	1.82	9/11	55.99%	56.24%	56.73%
60¢	60%	$66.67	-150	1.67	2/3	60.96%	61.20%	61.68%
65¢	65%	$53.85	-186	1.54	7/13	65.91%	66.14%	66.59%
70¢	70%	$42.86	-233	1.43	3/7	70.84%	71.05%	71.47%
75¢	75%	$33.33	-300	1.33	1/3	75.75%	75.94%	76.31%
80¢	80%	$25.00	-400	1.25	1/4	80.64%	80.80%	81.12%
85¢	85%	$17.65	-567	1.18	3/17	85.51%	85.64%	85.89%
90¢	90%	$11.11	-900	1.11	1/9	90.36%	90.45%	90.63%
95¢	95%	$5.26	-1900	1.05	1/19	95.19%	95.24%	95.33%
97¢	97%	$3.09	-3233	1.03	1/20	97.12%	97.15%	97.20%
98¢	98%	$2.04	-4900	1.02	0/1	98.08%	98.10%	98.14%
99¢	99%	$1.01	-9900	1.01	0/1	99.04%	99.05%	99.07%

Profit is before fees and assumes the share pays $1. Break-even adds Polymarket's taker fee (shares x rate x p x (1 - p)) at three category rates; maker orders and fee-free markets break even at the price itself. Current rates: Polymarket fees.

Sportsbook lines as Polymarket prices

Sportsbook line	Polymarket price with the same implied chance	Decimal
-1000	90.9¢	1.10
-500	83.3¢	1.20
-300	75.0¢	1.33
-200	66.7¢	1.50
-150	60.0¢	1.67
-120	54.5¢	1.83
-110	52.4¢	1.91
+100	50.0¢	2.00
+120	45.5¢	2.20
+150	40.0¢	2.50
+200	33.3¢	3.00
+300	25.0¢	4.00
+500	16.7¢	6.00
+1000	9.1¢	11.00
+2000	4.8¢	21.00

A sportsbook's two sides add up to more than 100% (its margin), so compare a Polymarket price with the book's no-vig chance: sportsbook odds converter.

Frequently asked questions

How do I convert a Polymarket price to American odds?

Treat the price as the chance p. At 50¢ or more the odds are minus 100 x p / (1 - p): 75¢ is -300. Below 50¢ they are plus 100 x (1 - p) / p: 20¢ is +400. Decimal odds are 1 / p.

How much do I win on Polymarket?

Each share pays $1 if its outcome happens. A $100 stake at price p buys 100 / p shares, so the profit is 100 x (1 - p) / p: $100 at 25¢ wins $300, at 80¢ it wins $25, before fees.

How do fees change the break-even chance?

A taker pays shares x rate x p x (1 - p), so each share costs p x (1 + rate x (1 - p)). At the 7% crypto rate a 50¢ share needs 51.75% to break even; maker orders and fee-free markets pay nothing. Rates by category: see Polymarket fees on this site.

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