How many calories in a grilled portobello mushroom?

Calories in brown mushrooms

There are:

• approx 8 calories in each ounce or 28g of uncooked brown mushrooms
• approx 19 calories in 1 cup, pieces/slices uncooked
• approx 23 calories in 1 cup of whole uncooked
• approx 27 calories in 3½ oz or 100g uncooked
• approx 48 calories in 6 oz or 170g uncooked
• approx 64 calories in 8 oz or 227g uncooked brown mushrooms.

For the calories in other vegetables, and a vegetable calories chart, which you can use as a daily guide, see the page link, further down this page, listed under Related Questions.