Contamination Loss Calculator

Contamination is the single biggest source of lost yield for most growers. This calculator takes the number of blocks you started and your contamination rate and returns how many blocks remain harvestable, how many are wasted, and the effective yield once losses are applied. Use it as a quick mushroom rate calculator — and an estimate calculator for how much a bad batch actually costs you — alongside the per-block yield from the Biological Efficiency calculator.