About OSRS Brain

OSRS Brain is a small collection of calculators for Old School RuneScape activities that involve more math than you'd like to do in your head — Kingdom of Miscellania, Golem Crafting, the Mage Training Arena, Mahogany Homes, the Corrupted Gauntlet and Gemstone Crab — and more coming.

Everything runs in your browser. Nothing you type is sent anywhere or stored on a server.

This is a fan-made, unofficial project and is not affiliated with or endorsed by Jagex Ltd. Old School RuneScape and all related names are trademarks of Jagex Ltd. Formulas are sourced from the Old School RuneScape Wiki and community research — always double-check important decisions in-game, as game mechanics can change with updates.