Portobello Mushroom converter: whole portobello mushrooms, cups, grams

A recipe says '4 portobello caps for stuffing' or '200 g sliced portobello' but you bought them whole and they vary. A medium portobello cap is about 120 g, so the count moves with size. This converter shifts between whole portobello caps, sliced cups, grams, and ounces.

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?

A medium, or average, portobello mushroom weighs about 120 g, with a small one around 80 g and a large one around 200 g.

Related Portobello Mushroom Ingredients

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

Portobello Mushroom converter tool

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

Size applies to whole portobello mushrooms (small / medium / large).

Result

1.33 cups

Portobello Mushroom Calculators & Kitchen Tools

Working with portobello mushroom? These tools handle the jobs a converter cannot.

  • Oven to Air Fryer Converter Match the temperature and time when you swap the oven for an air fryer, fan oven, or slow cooker.
  • Recipe Scaler Scale any recipe up or down and keep every ingredient in ratio.
  • Volume Converter Switch between cups, tablespoons, teaspoons and millilitres for any ingredient.
  • Weight Converter Switch between grams, ounces, pounds and kilograms for any ingredient.

Common Portobello Mushroom conversions

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

portobello mushroomsCups (chopped)
1 portobello mushroom1.33 cups
2 portobello mushrooms2.67 cups
3 portobello mushrooms4 cups
4 portobello mushrooms5.33 cups
5 portobello mushrooms6.67 cups
6 portobello mushrooms8 cups

Portobello Mushroom conversion chart

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

portobello mushroomscupscups (US)gozlbkg
1 portobello mushroom1.33 cups1.4 cups (US)120 g4.23 oz0.26 lb0.12 kg
2 portobello mushrooms2.67 cups2.79 cups (US)240 g8.47 oz0.53 lb0.24 kg
3 portobello mushrooms4 cups4.19 cups (US)360 g12.7 oz0.79 lb0.36 kg
4 portobello mushrooms5.33 cups5.58 cups (US)480 g16.93 oz1.06 lb0.48 kg
5 portobello mushrooms6.67 cups6.98 cups (US)600 g21.16 oz1.32 lb0.6 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.

VarietyBest for
Portobello (Standard)Burgers, grilling, and stuffing: mature brown cap with deep gills, dense and meaty when cooked.
King OysterVegan scallops and steaks: thick white stems that take a sear; closest meaty substitute when portobello is out.
Lion's ManeVegan 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

What is the size of a medium portobello mushroom?
A medium portobello mushroom weighs about 120 g, which works out to roughly 1.33 cups (1.4 US cups) of chopped flesh. Portobello mushrooms come in a range of sizes depending on the season, variety and where they were grown, so weight and cup figures shift accordingly. Use the size selector above to match what you actually have, then read the exact conversion for any amount.
How much does a medium portobello mushroom weigh?
A medium portobello mushroom weighs about 120 g, with a small one around 80 g and a large one near 200 g. That range changes the weight of any recipe that counts portobello mushrooms by the piece, so set the size selector to match what you actually have before trusting a cup or gram figure.
How much does an average portobello mushroom weigh?
An average portobello mushroom is the same as a medium one: about 120 g. A small portobello mushroom is lighter at around 80 g and a large one heavier at about 200 g, so the size you actually have changes the total for any recipe that counts portobello mushrooms by the piece rather than by weight.
How much does a large portobello mushroom weigh?
A large portobello mushroom weighs about 200 g, noticeably more than a medium, or average, one at 120 g or a small one at 80 g. Set the size selector to large to convert cups, grams and ounces for the bigger portobello mushrooms you actually have on the counter.
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.
How do I convert grams to ounces for any ingredient?
Converting grams to ounces is pure weight maths that applies to any food, not just portobello mushrooms, so 200 grams is always 7.05 ounces. For other amounts, the weight converter at the link below handles grams, ounces, pounds, kilograms and stone in both directions. Grams to ounces converter

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