Mushrooms are one of the lowest-calorie ingredients you can add to a plate, but serving sizes can be confusing because cups of whole caps, sliced pieces, and different varieties all weigh differently. This mushroom calories per cup calculator converts your serving of raw mushrooms into an estimated calorie count, plus protein, carbohydrate, fat, and fiber totals.
Enter the number of cups, choose the mushroom variety, and select whether your cup is filled with whole caps or sliced/chopped pieces. The calculator uses typical cup weights for each variety—for example, a cup of sliced white mushrooms weighs less than a cup of whole caps—so your estimate is more realistic than a generic one-cup-of-mushrooms figure.
Built for meal prep, calorie tracking, and healthier eating, this tool is useful for anyone following a calorie-conscious diet, logging meals in an app, or planning a low-calorie vegetable-forward meal. Because mushrooms are mostly water, even a generous two-cup portion stays very low in energy.
🍄 Mushroom Calories Per Cup Calculator
Estimate calories, weight, and macros for raw mushrooms by cup volume.
Step-by-Step Guide
Using the calculator takes only a few seconds. Start by entering the number of cups in the Amount field. Decimals work fine, so 0.5, 1.25, and 2 are all valid. Next, choose the mushroom variety from the dropdown. If you are using a mixture of mushrooms, pick the variety that makes up the largest share of the dish, or use White / Button as a reasonable stand-in. Then choose how the cup is filled: sliced or chopped mushrooms pack more tightly than whole caps, so the grams per cup change. Press Calculate to see the total calories, estimated weight, protein, carbohydrate, fat, and fiber. Use Reset to clear the inputs, or Copy Result to save the summary for a food diary.
- Enter the number of cups (decimals allowed).
- Select the mushroom variety that matches your ingredient.
- Choose Sliced / chopped or Whole caps to match how you measured the cup.
- Click Calculate and review the calorie and macro totals.
How the Calorie Estimate Is Calculated
The calculator works from two pieces of data: the calorie density of each mushroom variety in kcal per 100 g, and the typical weight of one cup. A cup of whole white mushrooms weighs roughly 96 g, while a cup of sliced white mushrooms weighs about 70 g because the pieces settle differently in the measuring cup. Even though both are one cup, the weight difference changes the calorie total. The basic formula is:
Calories = cups × grams per cup × (kcal per 100 g ÷ 100)
For example, 1 sliced cup of white mushrooms: 1 × 70 × (22 ÷ 100) ≈ 15.4 kcal.
Nutrient values in this tool are based on raw mushrooms and standard USDA nutrition references. The macro values are approximate because growing conditions, harvest time, and water content can shift the exact numbers. If you select the metric cup option, the calculator increases the cup volume by about 5.7 percent, since a 250 ml metric cup holds slightly more than a 240 ml US cup.
Mushroom Calorie Reference Table
Here are typical raw values for common mushroom varieties. Whole cups are looser; sliced cups pack more mushroom into the same volume for some varieties, which is why the calorie values differ.
| Variety | kcal per 100 g | Whole cup (g) | Sliced cup (g) | Whole cup kcal | Sliced cup kcal |
|---|---|---|---|---|---|
| White / Button | 22 | 96 | 70 | 21.1 | 15.4 |
| Cremini / Baby Bella | 22 | 87 | 72 | 19.1 | 15.8 |
| Portobello | 22 | 86 | 80 | 18.9 | 17.6 |
| Shiitake | 34 | 89 | 97 | 30.3 | 33.0 |
| Oyster | 33 | 86 | 64 | 28.4 | 21.1 |
| Enoki | 37 | 64 | 64 | 23.7 | 23.7 |
| Morel | 31 | 66 | 60 | 20.5 | 18.6 |
| Chanterelle | 32 | 54 | 54 | 17.3 | 17.3 |
| Maitake / Hen of the Woods | 37 | 72 | 64 | 26.6 | 23.7 |
These figures are useful for meal planning, but actual cup weights can vary with chop size, moisture, and how firmly the cup is packed. For the most reliable data, check the USDA FoodData Central database.
Worked Examples
Example 1: Sliced cremini in a stir-fry. You measure 1.5 cups of sliced cremini mushrooms. Cremini has 22 kcal per 100 g, and a sliced cup weighs about 72 g. Total weight = 1.5 × 72 = 108 g. Total calories = 108 ÷ 100 × 22 = 23.8 kcal. Protein ≈ 2.4 g, carbs ≈ 4.0 g, and fat ≈ 0.1 g.
Example 2: Whole shiitake caps in soup. You use 2 US cups of whole shiitake mushrooms. Shiitake is more calorie-dense at about 34 kcal per 100 g, with a whole-cup weight near 89 g. Total weight = 2 × 89 = 178 g. Total calories = 178 ÷ 100 × 34 = 60.5 kcal. Switching to metric cups adds about 6 percent more mushroom by volume, bumping the total to roughly 64 kcal.
Tips for Accurate Tracking
- Measure mushrooms raw, before cooking. Cooking removes water and changes both weight and calorie density per gram.
- Use the cut that matches your recipe. A whole-cup measurement and a sliced-cup measurement are not the same gram weight.
- Do not press mushrooms firmly into the measuring cup; a loose fill is closer to standard reference values.
- If you are logging calories for weight loss, a kitchen scale is even more accurate than a measuring cup.
- Compare mushroom calories with other produce using similar per-cup tools like apricot calories per cup, beet calories per cup, and corn calories per cup.
Mushrooms are a smart volume food: they add texture and savory flavor to stir-fries, omelets, soups, and pasta dishes while contributing very few calories. A whole cup of most raw mushroom varieties stays under roughly 35 kcal.
Limitations and Precision Notes
This calculator is designed for raw, fresh mushrooms. Dried mushrooms, marinated mushrooms, and mushrooms cooked in oil or butter will have very different calorie values. The cup weights are averages drawn from standard references; your actual cup may differ based on how coarsely you chop, how fresh the mushrooms are, and how tightly the cup is packed. Macro values are rounded estimates and are not a substitute for lab-tested nutrition labels.
If you are tracking calories for medical reasons or managing a condition that requires precise macronutrient intake, weigh your mushrooms on a food scale and refer to the nutrition information on the specific product packaging whenever possible.