How do you convert fresh mushrooms recipe measurements to dried mushrooms?

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Converting fresh mushroom recipes to using dried mushrooms is pretty easy.  It takes an average of 9lbs of fresh mushrooms to make a pound of high quality dried mushrooms, so all you need is some very basic math. We’ve created an easy-to-use calculator here, but have included the equations below in case you want them.

right mushroom




If your recipe specifies a number of pounds, use this equation:
(# lbs. of Fresh Mushrooms x 16) ÷ 9 = # ozs. Dried Mushrooms

If your recipe asks for ounces, use this equation:
# ozs. Fresh Mushrooms ÷ 9 = # ozs. Dried Mushrooms

If your recipe asks for cups, use this equation:
(# cps. of Fresh Mushrooms x 3) ÷ 9 = Estimate # ozs. of Dried Mushrooms
(Each cup of fresh mushrooms weighs between 2.5 and 3.5 ounces. The above equation uses 3 as an average. Feel free to adjust up or down to suit recipe.)

Dried wild mushrooms are a great way to enjoy mushroom varieties anytime that may only be available fresh for a month each year.  And of course, they’re also significantly lighter without all that water weight, so they’re cheaper to ship, and reconstituting dried mushrooms is really easy.  They’re also non-perishable, so they won’t take up fridge space and they’ll stay good for over a year in an airtight container in a cupboard.

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17 Responses to “How do you convert fresh mushrooms recipe measurements to dried mushrooms?”

  1. 1
    eugene silva says:

    The formulas were switched, it should be:
    for lbs. ==> # lbs. Fresh Mushrooms ÷ 9 = # ozs. Dried Mushrooms
    for ozs. ==> # ozs. of Fresh Mushrooms ÷ 16) ÷ 9 = # ozs. Dried Mushrooms

  2. 2
    eugene silva says:

    Never mind my comments! sorry

  3. 3
    Rose says:

    How to covert cups of dried to ounces of fresh?

  4. 4
    Matthew says:

    Hi Rose,

    Unfortunately, converting volume to weight is tricky, as the weight of a cup of dried mushrooms can vary considerably with the number of pieces you can fit (or more importantly, that the recipe author could fit) in a cup. If the pieces are big, your cup’s weight will be lower than if the pieces are small.

    You could buy some dried mushrooms of the variety you’re trying to convert, weigh a cup of them, then convert on a 1lb dried is roughly equal to 9lb fresh basis. Sorry we can’t be more helpful than that, but it really does vary a lot.


  5. 5
    Prerna says:

    How can i convert 8.85mg/g of dry weight in to …mg/g of fresh weight

  6. 6
    Matthew says:

    Hi Prerna,

    Sorry for my confusion regarding the metric system, but are you asking to convert from 8.85 milligrams or 8.85 grams?


  7. 7
    Prerna says:

    Hi Mathew its 8.85mg per gram of dry weight n I want to convert it in to fresh weight , I dont knw the conversion formula

  8. 8
    Matthew says:

    Hi again Prerna,

    I should think the ratio would be the same – if it takes 9lbs of fresh mushrooms to make a pound of dried, multiplying your dried weight by 9 should give you a rough fresh equivalent.


  9. 9
    ken says:

    If you grind 3 oz of dried porcine mushrooms, how many oz of powder will it yield?

  10. 10
    Matthew says:

    Hi Ken,

    You’ll probably lose a couple of milligrams to nooks & crannies in the grinder, but you should end up with close to three ounces.

    Marx Foods

  11. 11
    Joy says:

    Hello, in my part of the world it is gr & kilos. However the ratio is 1to 9, therefore multiplying the amount of dried mushrooms by 9 should give the equivalent of the fresh. Am I right?

    I have 30 grams of dried which should be equal to 270 grams of fresh?

    Joy, Denmark

  12. 12
    Ross says:

    Dear Sir/ Madame,
    Your website’s Fresh to Dried Conversion app has stopped working.
    Thank you.

  13. 13
    Matthew says:

    Hi Ross,

    You’re totally right! That’s a bummer:( We’re all hard at work on an exciting, huge secret project for Marx Foods at the moment, but I’ll ask our coder to swing back around & fix this soon.

    Sorry it wasn’t available for you.

    Marx Foods

  14. 14
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