Can popcorn fit a keto diet?

Usually does not fit

Usually, no: plain microwave popcorn does not fit a keto diet.

1 regular microwave bag weighs 85 g; it has 38.1 g calculated net carbs. Its exact recipe or formulation can differ.

Check another amount

Values update from the same USDA record. They do not estimate a personal carb target or ketosis response.

Amount in grams

Listed source portion: 1 regular microwave bag (85 g).

Calculated net carbs

38.1 g

Total carbohydrate

46.8 g

Dietary fiber

8.7 g

Editorial illustration of Popcorn, microwave, plain.

Nutrition facts for Popcorn, microwave, plain

Source-portion carb band: Higher net carbs per listed portion. The category is based only on calculated net carbs for the listed portion: 5 g or less, more than 5 g to 10 g, or more than 10 g. Your total intake, preparation, and clinical context can change how a food fits your own plan.

Nutrient	Per listed portion: 1 regular microwave bag (85 g)	Per 100 g
Energy	440 kcal	518 kcal
Protein	7.8 g	9.1 g
Total fat	26 g	30.6 g
Saturated fat	12.2 g	14.3 g
Total carbohydrate	46.8 g	55 g
Dietary fiber	8.7 g	10.2 g
Calculated net carbs	38.1 g	44.8 g
Total sugars	0.5 g	0.6 g
Sodium	649.4 mg	764 mg
Potassium	197.2 mg	232 mg

The table keeps the USDA basis separate from the selected portion.

1. Food formPopcorn, microwave, plain
2. USDA per-100 g basis44.8 g calculated net carbs
3. Selected source portion38.1 g calculated net carbs
4. Calculation boundaryPortion value is calculated from the cited 100 g record and portion weight

Explore this food category

Compare this form and portion with other records in snacks & sweets. The category hub explains why forms, preparation, and portions should not be treated as interchangeable.

For meal-level context, use the keto snacks guide.

How the calculation works

Calculated net carbs = total carbohydrate − dietary fiber. For this USDA record, that is 55 g − 10.2 g = 44.8 g per 100 g. Net carbs is a planning convention used on this site; it is not a separate USDA nutrient field or a regulatory nutrition-label value. This calculation does not automatically subtract sugar alcohols.

For the underlying approach and its limitations, see how net carbs are explained and the net-carb calculator.

Food record and source

• USDA food description: Popcorn, microwave, plain
• FoodData Central ID: FDC ID 2708224
• Dataset: Survey (FNDDS) FNDDS 2021-2023 (2024-10-31)
• Record publication date: 10/31/2024
• Selected portion: 1 regular microwave bag (85 g)

The nutrition values are reported by the USDA per 100 g. The per-portion column above is calculated from that value and the USDA portion weight; no household measure was invented for this page.

1. USDA FoodData Central, Survey (FNDDS) FNDDS 2021-2023 (2024-10-31), FDC ID 2708224. https://fdc.nal.usda.gov/food-search/?query=2708224, https://fdc.nal.usda.gov/fdc-datasets/FoodData_Central_survey_food_json_2024-10-31.zip

Compare related foods

• Popcorn, ready-to-eat, plain — Compare another form of popcorn.
• Popcorn, ready-to-eat, plain, light — Compare another form of popcorn.
• Popcorn, microwave, plain, light — Compare another form of popcorn.

Browse all Food Database entries or start with the keto food list for practical meal-planning context.

Frequently Asked Questions

Can popcorn fit a keto diet?

Plain microwave popcorn usually does not fit a keto diet. The 1 regular microwave bag (85 g) measure contains 38.1 g calculated net carbs.

How many net carbs are in Popcorn, microwave, plain?

The listed 1 regular microwave bag (85 g) has 38.1 g calculated net carbs. Per 100 g, the record has 44.8 g calculated net carbs.

How are net carbs calculated for Popcorn, microwave, plain?

247-Keto calculates net carbs as total carbohydrate minus dietary fiber, capped at zero. For this record, that is 55 g total carbohydrate minus 10.2 g fiber per 100 g. Sugar alcohols are not subtracted by this calculation.

Where do these Popcorn, microwave, plain nutrition facts come from?

The values come from USDA FoodData Central's Survey (FNDDS) FNDDS 2021-2023 (2024-10-31) release, FDC ID 2708224. The page preserves the listed food description and portion weight so the comparison is traceable.

Article history

1. September 11, 2026Updated after final factual and editorial review
2. August 24, 2026First published