QUICK ANSWER
How many calories are in low-fat buttermilk?
The selected cultured low-fat buttermilk provides 40 kcal per 100 g. Scale from the edible portion and keep other states separate.
40 kcal / 100 gNutrition values describe a reference food state, not every individual item. Variety, water content, preparation and portion weight can change the estimate.
THE NUMBERS
Low-fat buttermilk nutrition facts per 100 g
The values below use the reference state shown at the top of this page. Keeping one gram basis makes it easier to compare foods before translating the values to the portion you actually ate.
- Calories
- 40 kcal
- Protein
- 3.31 g
- Carbohydrate
- 4.79 g
- Fat
- 1.07 g
- Fibre
- 0 g
- Calcium
- 116 mg
- Potassium
- 151 mg
- Sodium
- 148 mg
Source: USDA FoodData Central SR Legacy record 170874. Values may be rounded for readability.
SERVING SIZE
Calories by portion and serving weight
Words such as “small,” “medium,” “half” and “one piece” are convenient but imprecise. Grams make the estimate reproducible, particularly when natural foods vary in size.
MACROS
Carbohydrate, protein and fat explained
Protein
3.31 g per 100 g. From Milk, buttermilk, fluid, cultured, lowfat.
Carbohydrate
4.79 g per 100 g. From Milk, buttermilk, fluid, cultured, lowfat.
Fat
1.07 g per 100 g. From Milk, buttermilk, fluid, cultured, lowfat.
MORE THAN CALORIES
Fibre, vitamins and minerals
One food does not need to provide every nutrient. These are the characteristics most useful for understanding where low-fat buttermilk fits in a varied eating pattern.
Calcium
116 mg per 100 g in the selected USDA record.
Potassium
151 mg per 100 g in the selected USDA record.
Sodium
148 mg per 100 g in the selected USDA record.
Riboflavin
0.154 mg per 100 g in the selected USDA record.
FOOD STATE MATTERS
How preparation changes the nutrition estimate
A reliable calorie entry should describe the food you actually ate—not merely a food with a similar name.
Cultured low-fat fluid
Selected reference.
Powdered
Use the dry product or prepared-product label.
Full-fat or traditional
Use the exact product label.
In baking
Log the complete recipe rather than the liquid alone.
PRACTICAL CONTEXT
How low-fat buttermilk can fit different goals
There is no universal “good” or “bad” food. Portion, frequency, the rest of the meal, preferences and individual health needs all matter.
Portion math
At 40 kcal per 100 g, the 30.6 g example is 12.2 kcal.
Fibre check
The selected record lists 0 g fibre per 100 g.
Protein check
The selected record lists 3.31 g protein per 100 g.
Best logging move
Measure the amount poured and use the exact product label when its fat level or formulation differs.
QUALITY & SAFETY
How to choose, store and prepare it
Store
Keep buttermilk chilled and follow package directions.
After opening or cooking
Keep the container closed and pour with clean cups or utensils.
Prepare
Follow package dairy-allergen guidance.
Safety boundary
The nutrient record does not establish storage duration or dairy-safety limits; follow package and current local guidance.
PHOTO LOGGING
How to log low-fat buttermilk more accurately
A food photo can suggest the ingredient, but it cannot always reveal exact weight, hidden oil or preparation details. These checks turn an image guess into a better estimate.
- 01
Match the exact reference state: Milk, buttermilk, fluid, cultured, lowfat.
- 02
Use edible grams. Calories are scaled from the selected per-100-g record; named portion weights come from the same local USDA record.
- 03
Log oil, sauce, sweetener, salt and recipe ingredients separately.
- 04
Use a separate record when preparation changes the food state.
COMMON QUESTIONS
Low-fat buttermilk calorie and nutrition questions
How many calories are in 100 g of buttermilk?
40 kcal in the selected Milk, buttermilk, fluid, cultured, lowfat record.
How much fibre is in buttermilk?
0 g per 100 g in the selected record.
Which buttermilk state does this page use?
Milk, buttermilk, fluid, cultured, lowfat. Preparation and edible state are part of the answer.
Is powdered buttermilk covered by this page?
No. The selected record is fluid cultured low-fat buttermilk.
How are the portion calories calculated?
Each portion is scaled from 40 kcal per 100 g. Named portion weights come from the selected source record.
KEEP EXPLORING
Related food guides
SOURCES & METHOD
Where these numbers come from
Milk, buttermilk, fluid, cultured, lowfat, per 100 g edible portion. Numeric nutrition and named-portion claims use the nutrition-reviewed local USDA record. Preparation notes cover the common USDA forms of this food. The nutrient record does not establish storage duration, clinical advice or food-safety limits; use package directions and current authoritative guidance where relevant.
Open USDA FoodData Central SR Legacy record 170874 ↗Page reviewed 26 August 2026. We show the food state, gram basis and source record so readers can check the estimate instead of treating one number as universally exact.