How many grams is one medium mushroom?

One medium mushroom is about 18 grams, a small one about 10 grams and a large one about 27 grams. Mushrooms vary in size, which is the main reason a recipe that counts mushrooms can still vary in weight. Set the size selector to match what you have, then read the exact figure for any count above.

Convert Mushroom from Whole Mushrooms to Grams

Mushroom converter

Use the tool below to convert mushroom from Whole Mushrooms to Grams.

A small white-button mushroom is barely over a third the weight of a large one, so 'eight mushrooms' in a sauce can swing the yield. Pick the right size below to keep risotto, pasta, and stroganoff on target. Sizes here cover white buttons only; portobello caps run much larger and aren't included.

How much does a mushroom weigh in grams?

A medium mushroom weighs about 18 g, with a small one around 10 g and a large one around 27 g. Set the size selector to match what you have, then read the exact gram weight for any number of mushrooms above.

Got portobello caps? Those weigh 80–200 g whole, well above white button. See our Portobello Mushroom converter.

Enter an amount, pick your units, and set the size for counting whole mushrooms.

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Mushroom sizeSize applies to whole mushrooms (small / medium / large).

Result

18 g

Common Mushroom conversions

Quick reference for mushroom at medium size. Switch the size in the converter above for small or large.

mushrooms	Grams
1 mushroom	18 g
2 mushrooms	36 g
3 mushrooms	54 g
4 mushrooms	72 g
5 mushrooms	90 g
6 mushrooms	108 g

Mushroom conversion chart

The chart below shows how whole mushrooms (medium size) convert to cups, grams and ounces.

mushrooms	g	cups	cups (US)	oz	lb	kg
1 mushroom	18 g	0.25 cups	0.26 cups (US)	0.63 oz	0.04 lb	0.02 kg
2 mushrooms	36 g	0.49 cups	0.51 cups (US)	1.27 oz	0.08 lb	0.04 kg
3 mushrooms	54 g	0.74 cups	0.77 cups (US)	1.9 oz	0.12 lb	0.05 kg
4 mushrooms	72 g	0.99 cups	1.03 cups (US)	2.54 oz	0.16 lb	0.07 kg
5 mushrooms	90 g	1.23 cups	1.29 cups (US)	3.17 oz	0.2 lb	0.09 kg

Mushroom varieties and best uses

The conversions above are the same whatever variety you use; the difference is what each is good for. Here is how the common mushroom varieties compare.

Variety	Best for
White Button	Everyday sautéing, soups, and pizza: mild and tender, the standard supermarket mushroom.
Cremini (Baby Bella)	All-purpose cooking: brown-skinned, firmer, meatier white-mushroom variety with deeper flavour. Sold as Cremini, Baby Bella, or Portobellini.
Shiitake	Asian dishes and stocks: woody stems, strong umami; sold fresh or dried.
Oyster	Quick sautés and stir-fries: delicate, fan-shaped caps that cook in minutes.
Chestnut	Roasting and risotto: nutty brown caps, firmer than white button, similar to cremini.
Porcini	Risotto, sauces, and stews: deeply savoury; usually sold dried and rehydrated.

Which should I pick?

For everyday sautéing, pasta, and risotto, Cremini (Baby Bella) gives deeper, meatier flavour than White Button. No Cremini? White Button is the reliable supermarket default. For stocks and stir-fries that want strong umami, reach for Shiitake; for tender quick sautés where you don't want the mushroom to overpower, Oyster.

Frequently Asked Questions

How many grams is one medium mushroom?: One medium mushroom is about 18 grams, a small one about 10 grams and a large one about 27 grams. Mushrooms vary in size, which is the main reason a recipe that counts mushrooms can still vary in weight. Set the size selector to match what you have, then read the exact figure for any count above. Open the mushroom converter
Which mushroom variety should I use?: For everyday sautéing, pasta, and risotto, Cremini (Baby Bella) gives deeper, meatier flavour than White Button. No Cremini? White Button is the reliable supermarket default. For stocks and stir-fries that want strong umami, reach for Shiitake; for tender quick sautés where you don't want the mushroom to overpower, Oyster.

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