Microwave Popcorn Calories & Carbs
Last updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per 1 bag popped (100g); per 100 g: 36.5g net carbs, 424 cal. Net carbs = total carbs − fiber − sugar alcohols — do the math for any label with the free net carbs calculator.
How many carbs are in microwave popcorn?
Microwave Popcorn — 1 bag popped (100g) — has 36.5g net carbs: 44g total carbs minus 7.5g fiber, plus 11g protein, 24g fat, and 424 calories. Per 100g that is 36.5g net carbs (44g total carbs, 7.5g fiber) and 424 calories. That makes microwave popcorn high in net carbs and lower than the typical snacks and sweet, which averages about 55.0g net carbs per 100g. At this carb count, microwave popcorn is best limited to small portions on keto (usually 20–50g net carbs per day). Values are per 100 g, sourced from Manufacturer-reported values; net carbs are computed by CarbMeNot.
Is microwave popcorn keto-friendly?
Microwave Popcorn is generally not keto-friendly. 1 bag popped (100g) is 36.5g net carbs (44g total carbs − 7.5g fiber); per 100g that is 36.5g net carbs. On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
Keeping an eye on carbs in microwave popcorn?
Microwave Popcorn runs higher in carbs, so portions matter. CarbMeNot tracks every gram from a photo, so you stay under your daily limit without the math.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 1 bag popped | 36.5g | 44g | 11g | 424 |
| 100 g (3.5 oz) | 36.5g | 44g | 11g | 424 |
| 1 oz (28 g) | 10.2g | 12.3g | 3.1g | 119 |
How many calories are in microwave popcorn?
Microwave Popcorn — 1 bag popped (100g) — has 424 calories, with 11g protein, 24g fat, and 36.5g net carbs. Per 100g: 424 calories and 36.5g net carbs.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 424 |
| Total carbs | 44g |
| Net carbs | 36.5g |
| Fiber | 7.5g |
| Sugar | 0g |
| Sugar alcohols | 0g |
| Protein | 11g |
| Fat | 24g |
| Sodium | 805mg |
| Potassium | 0mg |
Source: Manufacturer-reported values (snacks-sweets). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in microwave popcorn?
- Microwave Popcorn (1 bag popped, 100g) has 44g of total carbs and 36.5g of net carbs. Per 100 grams: 44g total, 36.5g net.
- How many net carbs are in microwave popcorn?
- Microwave Popcorn has 36.5g of net carbs per 1 bag popped (100g) — 44g total carbs minus 7.5g fiber.
- Is microwave popcorn keto-friendly?
- Microwave Popcorn is generally not keto-friendly. 1 bag popped (100g) is 36.5g net carbs (44g total carbs − 7.5g fiber); per 100g that is 36.5g net carbs. On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
- How many calories are in microwave popcorn?
- Microwave Popcorn (1 bag popped, 100g) has 424 calories; that is 424 calories per 100 grams.
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CarbMeNot provides general nutrition information, not medical advice. Values are estimates — verify before relying on them for any health decision. See our Medical Disclaimer.