Can microwave light popcorn fit a keto diet?

Usually does not fit

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

The 1 100 calorie package (30 g) portion contains 17.5 g calculated net carbs. Its formulation and preparation 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: 1 100 calorie package (30 g).

Calculated net carbs

17.5 g

Total carbohydrate

21.5 g

Dietary fiber

4 g

Editorial illustration of Popcorn, microwave, plain, light.

Nutrition facts for Popcorn, microwave, plain, light

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: 1 100 calorie package (30 g)	Per 100 g
Energy	123 kcal	409 kcal
Protein	3.6 g	11.9 g
Total fat	3 g	10.1 g
Saturated fat	0.8 g	2.5 g
Total carbohydrate	21.5 g	71.7 g
Dietary fiber	4 g	13.4 g
Calculated net carbs	17.5 g	58.3 g
Total sugars	0.2 g	0.8 g
Sodium	229.8 mg	766 mg
Potassium	90.9 mg	303 mg

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

1. Food formPopcorn, microwave, plain, light
2. USDA per-100 g basis58.3 g calculated net carbs
3. Selected source portion17.5 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 71.7 g − 13.4 g = 58.3 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, light
• FoodData Central ID: FDC ID 2708225
• Dataset: Survey (FNDDS) FNDDS 2021-2023 (2024-10-31)
• Record publication date: 10/31/2024
• Selected portion: 1 100 calorie package (30 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 2708225. https://fdc.nal.usda.gov/food-search/?query=2708225, https://fdc.nal.usda.gov/fdc-datasets/FoodData_Central_survey_food_json_2024-10-31.zip

Compare related foods

• Popcorn, ready-to-eat, plain, light — Compare another form of popcorn.
• Popcorn, ready-to-eat, plain — Compare another form of popcorn.
• Popcorn, microwave, plain — 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 microwave light popcorn fit a keto diet?

Plain light microwave popcorn usually does not fit a keto diet, and 1 100 calorie package (30 g) contains 17.5 g calculated net carbs.

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

The listed 1 100 calorie package (30 g) has 17.5 g calculated net carbs. Per 100 g, the record has 58.3 g calculated net carbs.

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

247-Keto calculates net carbs as total carbohydrate minus dietary fiber, capped at zero. For this record, that is 71.7 g total carbohydrate minus 13.4 g fiber per 100 g. Sugar alcohols are not subtracted by this calculation.

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

The values come from USDA FoodData Central's Survey (FNDDS) FNDDS 2021-2023 (2024-10-31) release, FDC ID 2708225. 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