Total Cost
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Gross Payout
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Fee
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Net Profit
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ROI
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When Should You Use This?
Use this calculator before placing any Polymarket trade to understand your potential profit, total cost, and fees. Enter your buy price in cents (e.g. 35 for a YES share at $0.35), the number of shares, and the expected resolution or sell price.
How It Works
1
Enter Buy Price
Input the price per share in cents. On Polymarket, shares trade between 1 and 99 cents. A YES share at 35 cents means the market implies a 35% probability.
2
Set Shares & Exit
Enter how many shares you want to buy and the price you expect to sell at (or 100 if the event resolves YES, 0 if NO).
3
Read Your Profit
The calculator shows your total cost, gross payout, fees deducted, net profit, and ROI percentage.
Frequently Asked Questions
Each share pays $1.00 if the event resolves in your favor and $0.00 if it doesn't. You buy YES or NO shares at a price between $0.01 and $0.99. The price reflects the market's implied probability.
Polymarket charges taker fees that vary based on share price, with a maximum of about 1.56% at the 50-cent price point. Maker orders can earn rebates. There are no deposit or withdrawal fees from Polymarket itself.
Yes. You can sell your shares at any time at the current market price. You don't have to wait for the event to resolve.
The maximum loss is the total amount you paid for your shares. If you buy 100 YES shares at $0.35 each, your maximum loss is $35.00 if the event resolves NO.
ROI = (Net Profit / Total Cost) x 100. If you spend $35 and net $63.50 after fees, your ROI is 181%.