How to price a Polymarket market

A Polymarket-style market usually starts with a fair view and then turns that view into a quoted price. The bookmaking calculator does that by taking your no-vig numbers and applying a target hold.

Enter your fair values in the format you prefer. If you think in percentages, use implied probability. If you think in odds, switch to decimal, American or fractional.

Once the fair side is entered, set the target hold. The calculator will show the final quoted probability, quoted odds and the extra edge added versus your fair number for every selection.

This is especially helpful when a market has more than two selections. Instead of pricing each runner by hand, you can keep the whole book consistent and see the final implied total immediately.