How many calories in
mushrooms?
White button mushrooms are 22 calories per 100g. Portobellos and creminis are similar. Mushrooms shrink dramatically when cooked (water loss), so 1 cup raw becomes about 1/2 cup cooked — but the calorie count of the same starting weight stays the same.
Common serving sizes.
Calories scale with portion. Here's how a typical mushrooms serving translates in your tracker:
What 22 calories means.
Very low calorie — at 22 kcal per 100g (white button), mushrooms adds volume to a meal without meaningfully denting a calorie deficit.
Mushrooms vs. similar foods.
How mushrooms stacks up on calories and protein against foods people commonly compare it to:
Skip the lookup. Snap the plate.
Point your iPhone camera at mushrooms and Spotwell's AI estimates the portion and macros in a few seconds. Check it, adjust anything that looks off, and log it.
Download on theApp StoreQuick answers.
How many calories in mushrooms?
Mushrooms has approximately 22 calories per 100g (white button). A typical serving — 1 cup, sliced (70g) — comes in at 15 calories.
How much protein is in mushrooms?
3.1g of protein per 100g (white button). That puts mushrooms at roughly 14.1g of protein per 100 calories — a useful lens when comparing to other vegetables sources.
How do I log mushrooms accurately?
The simplest method: weigh it on a kitchen scale, then enter grams in your tracker. With Spotwell, you can skip the scale — point the camera at the plate and the AI estimates the portion in a few seconds. Adjust the value if it looks off.
Is mushrooms good for weight loss?
It depends on your overall calorie target. Mushrooms is naturally low-calorie at 22 kcal per 100g (white button), so it's easy to fit into a deficit.