This calculator assumes you are using 12 slots for smelting ores in the large furnace. This number was choosen as an ideal number for speed to efficiency tradeoff. You can only smelt one type of ore ...

IGN shows you how to build and use a furnace in Rust. With this tool, you can smelt ores into usable items like metal fragments and craft gunpowder with refined sulfur.

A Furnace will be needed when Crafting more intermediate items. This guide will teach you How to Build a Furnace and where to find the Resources. Using a furnace is incredibly simple - much like ...