How many grams is one medium portobello mushroom?

One medium portobello mushroom is about 120 grams, a small one about 80 grams and a large one about 200 grams. Portobello mushrooms vary in size, which is the main reason a recipe that counts portobello 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 Portobello Mushroom from Whole Portobello mushrooms to Grams

Portobello Mushroom converter

Use the tool below to convert portobello mushroom from Whole Portobello mushrooms to Grams.

A small portobello cap is well under half the weight of a giant burger-sized one, so 'four portobellos' on the grill can swing the yield a lot. Pick the right size below to keep burgers, fajitas, and stuffing on target.

How much does a portobello mushroom weigh in grams?

A medium portobello mushroom weighs about 120 g, with a small one around 80 g and a large one around 200 g. Set the size selector to match what you have, then read the exact gram weight for any number of portobello mushrooms above.

Got white button or cremini? Those are smaller (10–27 g whole). See our Mushroom converter.

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

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Portobello mushroom sizeSize applies to whole portobello mushrooms (small / medium / large).

Result

120 g

Common Portobello Mushroom conversions

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

portobello mushrooms	Grams
1 portobello mushroom	120 g
2 portobello mushrooms	240 g
3 portobello mushrooms	360 g
4 portobello mushrooms	480 g
5 portobello mushrooms	600 g
6 portobello mushrooms	720 g

Portobello Mushroom conversion chart

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

portobello mushrooms	g	cups	cups (US)	oz	lb	kg
1 portobello mushroom	120 g	1.33 cups	1.4 cups (US)	4.23 oz	0.26 lb	0.12 kg
2 portobello mushrooms	240 g	2.67 cups	2.79 cups (US)	8.47 oz	0.53 lb	0.24 kg
3 portobello mushrooms	360 g	4 cups	4.19 cups (US)	12.7 oz	0.79 lb	0.36 kg
4 portobello mushrooms	480 g	5.33 cups	5.58 cups (US)	16.93 oz	1.06 lb	0.48 kg
5 portobello mushrooms	600 g	6.67 cups	6.98 cups (US)	21.16 oz	1.32 lb	0.6 kg

Portobello 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 portobello mushroom varieties compare.

Variety	Best for
Portobello (Standard)	Burgers, grilling, and stuffing: mature brown cap with deep gills, dense and meaty when cooked.
King Oyster	Vegan scallops and steaks: thick white stems that take a sear; closest meaty substitute when portobello is out.
Lion's Mane	Vegan crab cakes and steak swaps: shaggy white clusters that pull apart into a tender, almost seafood-like texture.

Which should I pick?

For burgers, grilling, and stuffing, the standard mature Portobello cap is the pick: dense, meaty flesh that holds up under heat. No portobello? Thick-cut King Oyster gives a similarly meaty bite. For a vegan steak swap, Lion's Mane has a tender, almost crab-like texture.

Frequently Asked Questions

How many grams is one medium portobello mushroom?: One medium portobello mushroom is about 120 grams, a small one about 80 grams and a large one about 200 grams. Portobello mushrooms vary in size, which is the main reason a recipe that counts portobello 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 portobello mushroom converter
Which portobello mushroom variety should I use?: For burgers, grilling, and stuffing, the standard mature Portobello cap is the pick: dense, meaty flesh that holds up under heat. No portobello? Thick-cut King Oyster gives a similarly meaty bite. For a vegan steak swap, Lion's Mane has a tender, almost crab-like texture.

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