Simple Spawn to Substrate Calculator
Looking for an easy way to estimate how much grain spawn and bulk substrate to use?
Our Spawn to Substrate calculator is an easy way to determine how much bulk substrate you will need based on your monotub or growing chamber.
Is this mushroom substrate calculator helpful? Have recommendations or would you like to see more detailed information? Shoot us a message on the comment box below.
Shop our best-selling pasteurized manure substrates.
-
Product on sale -
Product on sale
Monotub is 12.5×10.5×3=600 ÷58 (approx Sq in. in a qt)=10 qts. Your calculator says 12 qts. What am I doing wrong?
Hey Mark, Thank you so very much for reaching out. We recently hired someone to replace our old calculator and it looks like they made a mistake in the calculation. I have gone ahead and updated this. I am sure that was frustrating and I truly appreciate you bringing it to my attention. Here is a coupon code for 10% off future purchases. Best regards, Danny
Same here, getting suggested almost 7lbs for a 6qt shoebox.
I’m getting 2.9 quarts of spawn and the same for substrate. I think the weight may be a little high, but some substrates weigh more than others. This is just about what I use with shoeboxes. What numbers did you use to get 7 pounds?