How many grams is a cup of portobello mushrooms?

A cup of portobello mushrooms is about 90 grams of portobello mushroom. The density of chopped portobello mushroom is fixed, so the ratio holds at any amount: double the cups and you double the grams. Use the converter above for any quantity, or the chart below for the most common amounts.

How many cups of portobello mushrooms is 90 grams?

90 grams of portobello mushrooms is about 1 cup. The conversion works the same in reverse, so you can switch between cups and grams without changing the result. This helps when a recipe lists one unit but you would rather measure the other. Use the converter above for any amount.

Convert Portobello Mushroom from Cups (chopped) to Grams

Portobello Mushroom converter

Use the tool below to convert portobello mushroom from Cups (chopped) 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 many grams is 1 cup of portobello mushroom?

One cup of chopped portobello mushroom weighs about 90 g. Half a cup is about 45 g and two cups about 180 g. The weight is the same at any item size, since it measures chopped flesh, so use the converter above for any cup amount.

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

No measuring cups? The tool below gets you close, and a measuring cup set keeps every batch the same.

Scoop it right, get measuring cups

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

90 g

Common Portobello Mushroom conversions

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

Cups (chopped)	Grams
0.25 cups	22.5 g
0.5 cups	45 g
0.75 cups	67.5 g
1 cup	90 g
1.5 cups	135 g
2 cups	180 g
3 cups	270 g

Portobello Mushroom conversion chart

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

cups	g	portobello mushrooms	cups (US)	oz	lb	kg
0.25 cups	22.5 g	0.19 portobello mushrooms	0.26 cups (US)	0.79 oz	0.05 lb	0.02 kg
0.5 cups	45 g	0.38 portobello mushrooms	0.52 cups (US)	1.59 oz	0.1 lb	0.05 kg
1 cup	90 g	0.75 portobello mushrooms	1.05 cups (US)	3.17 oz	0.2 lb	0.09 kg
1.5 cups	135 g	1.13 portobello mushrooms	1.57 cups (US)	4.76 oz	0.3 lb	0.14 kg
2 cups	180 g	1.5 portobello mushrooms	2.09 cups (US)	6.35 oz	0.4 lb	0.18 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 a cup of portobello mushrooms?: A cup of portobello mushrooms is about 90 grams of portobello mushroom. The density of chopped portobello mushroom is fixed, so the ratio holds at any amount: double the cups and you double the grams. Use the converter above for any quantity, or the chart below for the most common amounts. Open the portobello mushroom converter
How many cups of portobello mushrooms is 90 grams?: 90 grams of portobello mushrooms is about 1 cup. The conversion works the same in reverse, so you can switch between cups and grams without changing the result. This helps when a recipe lists one unit but you would rather measure the other. Use the converter above for any amount.
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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