Mushroom Substrate Calculator

Welcome to our free, easy-to-use Mushroom Substrate Calculator - designed specifically for mushroom growers of all experience levels. Whether you're cultivating gourmet mushrooms like oysters and lion's mane or working with cubensis varieties, getting your substrate mix exactly right is crucial for successful fruiting.

Our interactive calculator takes the guesswork out of preparing three essential mushroom growing formulations: bulk substrates for monotubs, grain spawn for inoculation, and master's mix for wood-loving species. Simply enter your container size, depth, and preferred ratios, then click "Calculate" to receive precise measurements for all ingredients including spawn, substrate, vermiculite, gypsum, and water.

This tool automatically adjusts for different substrate types including coco coir, compost, manure, straw, and hardwood sawdust, providing custom recipes tailored to your specific mushroom cultivation needs. Bookmark this page to streamline your mycology workflow and optimize your mushroom yields with scientifically balanced substrate formulations.