Can blue or roquefort cheese fit a keto diet?

Usually fits, with the stated form and amount caveats

Usually, yes: blue or Roquefort cheese can fit a keto diet.

1 slice weighs 21 g; it has 0.49 g calculated net carbs.

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 slice (21 g).

Calculated net carbs

0.49 g

Total carbohydrate

0.5 g

Dietary fiber

0 g

Editorial illustration of Cheese, Blue or Roquefort.

Nutrition facts for Blue or Roquefort cheese

Source-portion carb band: Lower 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 slice (21 g)	Per 100 g
Energy	74 kcal	353 kcal
Protein	4.5 g	21.4 g
Total fat	6 g	28.7 g
Saturated fat	3.9 g	18.7 g
Total carbohydrate	0.5 g	2.3 g
Dietary fiber	0 g	0 g
Calculated net carbs	0.49 g	2.3 g
Total sugars	0.1 g	0.5 g
Sodium	241.5 mg	1150 mg
Potassium	53.8 mg	256 mg

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

1. Food formBlue or Roquefort cheese
2. USDA per-100 g basis2.3 g calculated net carbs
3. Selected source portion0.49 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 dairy & alternatives. The category hub explains why forms, preparation, and portions should not be treated as interchangeable.

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

How the calculation works

Calculated net carbs = total carbohydrate − dietary fiber. For this USDA record, that is 2.3 g − 0 g = 2.3 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: Cheese, Blue or Roquefort
• FoodData Central ID: FDC ID 2705705
• Dataset: Survey (FNDDS) FNDDS 2021-2023 (2024-10-31)
• Record publication date: 10/31/2024
• Selected portion: 1 slice (21 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 2705705. https://fdc.nal.usda.gov/food-search/?query=2705705, https://fdc.nal.usda.gov/fdc-datasets/FoodData_Central_survey_food_json_2024-10-31.zip

Compare related foods

• Queso Asadero — Compare another food in the dairy and alternatives prepared food group.
• Cheddar cheese — Compare another food in the dairy and alternatives prepared food group.
• Provolone cheese — Compare another food in the dairy and alternatives prepared food group.

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

Frequently Asked Questions

Can blue or roquefort cheese fit a keto diet?

Blue or Roquefort cheese usually fits a keto diet, and 1 slice (21 g) has 0.49 g calculated net carbs.

How many net carbs are in Blue or Roquefort cheese?

The listed 1 slice (21 g) has 0.49 g calculated net carbs. Per 100 g, the record has 2.3 g calculated net carbs.

How are net carbs calculated for Blue or Roquefort cheese?

247-Keto calculates net carbs as total carbohydrate minus dietary fiber, capped at zero. For this record, that is 2.3 g total carbohydrate minus 0 g fiber per 100 g. Sugar alcohols are not subtracted by this calculation.

Where do these Blue or Roquefort cheese nutrition facts come from?

The values come from USDA FoodData Central's Survey (FNDDS) FNDDS 2021-2023 (2024-10-31) release, FDC ID 2705705. 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