Mushroom calculators

Free tools built for Canadian growers. No login, no email — just the math.

• Substrate calculator

  Enter bag or bucket size — get substrate mix, water ratio, and sterilization time.

• Fruiting chamber sizing

  Enter species, container, and count — get minimum chamber volume, FAE rate, and a fan recommendation.

• Yield estimator

  Enter species, substrate, weight, and flush count — get a low/mid/high yield range.

• Spawn calculator

  Enter species, substrate, and weight — get recommended spawn ratio, weight, and a Canadian cost estimate.

• Season & space planner

  Pick your grow space and the season — get the species that suit its temperature, plus the Canadian winter humidity watch-outs.

• Growing conditions chart

  Temperature, humidity, fresh-air, spawn rate, and time-to-harvest for every species — one reference table.