QUICK ANSWER
How many calories are in unsweetened oat milk?
The selected unsweetened refrigerated oat milk provides 48.3 kcal per 100 g. Scale from the edible portion and keep other states separate.
48.3 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
Unsweetened oat milk 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
- 48.3 kcal
- Protein
- 0.797 g
- Carbohydrate
- 5.1 g
- Fat
- 2.75 g
- Fibre
- 0 g
- Calcium
- 148 mg
- Potassium
- 148 mg
- Riboflavin
- 0.281 mg
Source: USDA FoodData Central Foundation record 2257046. 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
0.797 g per 100 g. From Oat milk, unsweetened, plain, refrigerated.
Carbohydrate
5.1 g per 100 g. From Oat milk, unsweetened, plain, refrigerated.
Fat
2.75 g per 100 g. From Oat milk, unsweetened, plain, refrigerated.
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 unsweetened oat milk fits in a varied eating pattern.
Calcium
148 mg per 100 g in the selected USDA record.
Potassium
148 mg per 100 g in the selected USDA record.
Riboflavin
0.281 mg per 100 g in the selected USDA record.
Sodium
42 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.
Unsweetened, plain, refrigerated
Selected reference.
Sweetened or flavoured
Use the exact package label.
Shelf-stable
Use the matching product label because formulation may differ.
In coffee or a smoothie
Log every added ingredient separately.
PRACTICAL CONTEXT
How unsweetened oat milk 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 48.3 kcal per 100 g, the 50 g example is 24.1 kcal.
Fibre check
The selected record lists 0 g fibre per 100 g.
Protein check
The selected record lists 0.797 g protein per 100 g.
Best logging move
Measure grams poured and use the label when the product is not this exact refrigerated unsweetened state.
QUALITY & SAFETY
How to choose, store and prepare it
Store
Keep refrigerated oat milk chilled and follow package directions.
After opening or cooking
Keep the container closed and pour with clean cups.
Prepare
Follow package allergen and cross-contact statements.
Safety boundary
The nutrient record does not establish storage duration; use the package date and current handling guidance.
PHOTO LOGGING
How to log unsweetened oat milk 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: Oat milk, unsweetened, plain, refrigerated.
- 02
Use edible grams. Calories are scaled from the selected per-100-g record; named portion weights come from the same local USDA record, while explicitly labelled gram examples are calculated.
- 03
Log oil, sauce, sweetener, salt and recipe ingredients separately.
- 04
Use a separate record when preparation changes the food state.
COMMON QUESTIONS
Unsweetened oat milk calorie and nutrition questions
How many calories are in 100 g of oat milk?
48.3 kcal in the selected Oat milk, unsweetened, plain, refrigerated record.
How much fibre is in oat milk?
0 g per 100 g in the selected record.
Which oat milk state does this page use?
Oat milk, unsweetened, plain, refrigerated. Preparation and edible state are part of the answer.
Why are all portions shown in grams?
The selected USDA record has no named portion weights, so this page uses transparent calculated gram amounts only.
How are the portion calories calculated?
Each portion is scaled from 48.3 kcal per 100 g. Named weights come from the selected source record; calculated gram examples are labelled.
KEEP EXPLORING
Related food guides
SOURCES & METHOD
Where these numbers come from
Oat milk, unsweetened, plain, refrigerated, per 100 g edible portion. Numeric nutrition claims use the nutrition-reviewed local USDA record. Named portion claims use source-held weights; explicitly labelled gram examples are calculations from the per-100-g record. 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 Foundation record 2257046 ↗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.