Polymarket Tools

Free tools to help you trade smarter on Polymarket. Calculate fees, check country availability, and more.

Fee Calculator

Calculate Polymarket trading fees by market category, trade size, and probability. Compare to sportsbook vig.

Calculate net profit or loss on any Polymarket trade including exact fees, ROI, and math breakdown.

Calculate expected value by comparing market price to your true probability estimate. Includes sensitivity analysis.

Convert between Polymarket prices, decimal, American, fractional, Hong Kong, Malay, and Indonesian odds.

Calculate optimal position size using the Kelly Criterion with adjustable fractional Kelly and growth rate analysis.

Project Polymarket referral earnings over 12 months with the 180-day commission window.

Check if Polymarket is available in your country. Instant status for 190+ countries.

Learn more about how Polymarket fees work, check country availability, or follow our signup guide to get started. For a full platform overview, read our Polymarket review.