How many ounces of portobello mushrooms is 0.33 US cups?

0.33 US cups of portobello mushrooms is about 1 ounce. The conversion works the same in reverse, so you can switch between ounces and US cups 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 Ounces to US cups (chopped)

Portobello Mushroom converter

Use the tool below to convert portobello mushroom from Ounces to US cups (chopped).

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 US cups is an ounce of portobello mushrooms?

An ounce of portobello mushrooms is about 0.33 US cups. Half that is about 0.16 US cups and double about 0.66 US cups, so the ratio scales in a straight line. Use the converter above for any amount, or the chart below for the most common quantities.

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

No scale? The tool below gives a good estimate, but for exact bakes a digital kitchen scale removes the guesswork.

Weigh it exact, get a scale

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

Convert from

Convert to

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

Result

0.33 cups (US)

Common Portobello Mushroom conversions

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

Ounces	US cups (chopped)
1 oz	0.33 cups (US)
2 oz	0.66 cups (US)
4 oz	1.32 cups (US)
8 oz	2.64 cups (US)
16 oz	5.27 cups (US)
32 oz	10.55 cups (US)

Portobello Mushroom conversion chart

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

oz	cups (US)	portobello mushrooms	cups	g	lb	kg
4 oz	1.32 cups (US)	0.94 portobello mushrooms	1.26 cups	113.4 g	0.25 lb	0.11 kg
8 oz	2.64 cups (US)	1.89 portobello mushrooms	2.52 cups	226.8 g	0.5 lb	0.23 kg
16 oz	5.27 cups (US)	3.78 portobello mushrooms	5.04 cups	453.59 g	1 lb	0.45 kg
24 oz	7.91 cups (US)	5.67 portobello mushrooms	7.56 cups	680.39 g	1.5 lb	0.68 kg
32 oz	10.55 cups (US)	7.56 portobello mushrooms	10.08 cups	907.18 g	2 lb	0.91 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 US cups is an ounce of portobello mushrooms?: An ounce of portobello mushrooms is about 0.33 US cups of portobello mushroom. The density of chopped portobello mushroom is fixed, so the ratio holds at any amount: double the ounces and you double the US cups. Use the converter above for any quantity, or the chart below for the most common amounts. Open the portobello mushroom converter
How many ounces of portobello mushrooms is 0.33 US cups?: 0.33 US cups of portobello mushrooms is about 1 ounce. The conversion works the same in reverse, so you can switch between ounces and US cups 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.

Other produce

Convert another fruit or vegetable: