Open-source utility

Steam Market Fee Calculator

Estimate the buyer-facing price or the amount a seller receives. The calculation uses integer minor units so minimum fees and rounding stay visible.

Reference tables

Generated from the same code as the calculator above: a full fee lookup table, round buyer prices including the ones no seller amount can produce, the 5%-only case for games with no publisher cut, a plot showing that the effective rate is not a flat 15%, and why one in eight extra cents never reaches the seller.

SteamVaults is an independent third-party service currently focused on buying and selling Mann Co. Supply Crate Keys with USDT. This open-source calculator remains a separate, general-purpose fee reference.

View the source on GitHub