Unsweetened Soy milk Calories and Nutrition Facts
Unsweetened Soy milk has 39 calories per 100 g, with 3.6 g protein, 1.3 g carbs and 2.1 g fat. Official USDA analytical record: Soy milk, unsweetened, plain, shelf stable (FDC ID: 1999630).
A 100g serving of unsweetened soy milk contains 39 calories, 3.6g protein, 1.3g total carbs (1.3g net carbs), and 2.1g fat.
Energy density
0.39 kcal/g
very low
Protein / 100 kcal
9.2 g
satiety per calorie
Net carbs / 100 g
1.3 g
carbs minus fibre
100 kcal portion
256 g
≈ 9 oz
- Sugars
- 0.6g
- Fibre
- 0g
- Saturated fat
- 0.3g
- Sodium
- 34mg
Soy milk, unsweetened, plain, shelf stable nutrition facts
The table below shows the complete nutritional profile for soy milk, unsweetened, plain, shelf stable per 100 g (the laboratory analytical standard), alongside the share of the FDA Daily Value each nutrient covers. Most of its calories come from fat, and it is relatively low in calories.
| Nutrient | Per 100 g | % DV* |
|---|---|---|
| Calories | 39 kcal | — |
| Protein | 3.6 g | 7% |
| Carbohydrate | 1.3 g | 0% |
| Fat | 2.1 g | 3% |
| Sugars | 0.6 g | — |
| Fibre | 0 g | 0% |
| Saturated fat | 0.3 g | 2% |
| Sodium | 34 mg | 1% |
*Percent Daily Value per 100 g, against the FDA reference intakes for adults and children 4+ years (50 g protein, 275 g carbohydrate, 28 g fibre, 78 g fat, 20 g saturated fat, 2300 mg sodium). Total sugars has no Daily Value — the 50 g reference applies to added sugars only, and USDA reports total sugars here.
Unsweetened Soy milk calories by weight: ounces, pounds and grams
USDA publishes this food per 100 g, so here is the same profile converted to the weights a kitchen scale and a US recipe actually use. At 0.39 kcal per gram (very low energy density), you can eat a large volume of this for very few calories, which makes it useful for filling out a meal in a deficit.
| Amount | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| 1 oz (28 g) | 11 kcal | 1 g | 0.4 g | 0.6 g |
| 100 g (3.5 oz) | 39 kcal | 3.6 g | 1.3 g | 2.1 g |
| 4 oz (113 g) | 44 kcal | 4.1 g | 1.5 g | 2.4 g |
| 8 oz / ½ lb (227 g) | 88 kcal | 8.2 g | 2.9 g | 4.8 g |
| 1 lb (454 g) | 177 kcal | 16.3 g | 5.9 g | 9.5 g |
Data sourced from USDA FoodData Central Foundation Foods dataset (public domain, CC0). Laboratory food profile and analytical measurements verified under USDA FDC ID 1999630.
View raw USDA laboratory entry →How unsweetened soy milk compares to other beans & legumes
Against the 20 beans & legumes in this database, unsweetened soy milk ranks 1st lowest in calories and 19th highest in protein. The category averages 244 kcal per 100 g, so this one is 84% below it. The lightest option in the category is soy milk, unsweetened, plain, shelf stable at 39 kcal per 100 g, and the protein leader is flour, soy, defatted at 51.1 g per 100 g.
| Beans & Legumes (by calories) | Calories | Protein | kcal/g |
|---|---|---|---|
| 🥛 Soy milk, unsweetened, plain, shelf stable (this page) | 39 kcal | 3.6 g | 0.39 |
| 🥛 Soy milk, sweetened, plain, refrigerated | 41 kcal | 2.8 g | 0.41 |
| 🫘 Beans, cannellini, canned, sodium added, drained and rinsed | 115 kcal | 7.4 g | 1.15 |
| 🍽️ Blackeye pea, canned, sodium added, drained and rinsed | 116 kcal | 6.9 g | 1.16 |
| 🫘 Beans, great northern, canned, sodium added, drained and rinsed | 117 kcal | 7 g | 1.17 |
Portion planning with unsweetened soy milk
- 100 calories comes to about 256 g (9 oz).
- 20 g of protein takes about 556 g, bringing 217 kcal with it — that is 9.2 g of protein per 100 calories.
- Macro split by calories: 14% carbs, 37% protein, 49% fat.
Nutrient screening detail
The badges near the top of this page come from screening the per-100 g values against the FDA nutrient-content thresholds in 21 CFR 101.54–101.62. The regulations define those claims per reference serving rather than per 100 g, so treat these as a like-for-like comparison between foods, not as a statement about a product label:
- Low calorie — 39 kcal per 100 g (≤ 40)
- Low fat — 2.1 g per 100 g (≤ 3 g)
- Low saturated fat — 0.3 g per 100 g (≤ 1 g)
- Very low sodium — 34 mg per 100 g (≤ 35 mg)
- Keto-friendly — 1.3 g net carbs per 100 g (≤ 5 g)
Track unsweetened soy milk for free
Add unsweetened soy milk to your day in the free calorie tracker — pick your serving, and the calories and macros are logged instantly. No account, no paywall. To plan how much you should eat, try the calorie calculator or macro calculator.
More beans & legumes
Unsweetened Soy milk FAQ & Nutrition Questions
How many calories and carbs are in 100 g of unsweetened soy milk?
One serving of 100 g provides 39 calories, 1.3 g total carbs, 3.6 g protein, and 2.1 g fat.
How many calories are in 100 g of unsweetened soy milk?
Unsweetened Soy milk contains 39 calories per 100 g, with 3.6 g protein, 1.3 g carbohydrate, and 2.1 g fat. Use the interactive calculator above to scale to any custom amount.
What is the USDA FoodData Central (FDC) ID for unsweetened soy milk?
The official USDA FoodData Central ID for "Soy milk, unsweetened, plain, shelf stable" is FDC ID: 1999630. You can view the verified laboratory analytical record on the USDA FoodData Central Database.
What is the macronutrient breakdown of unsweetened soy milk?
By calories, unsweetened soy milk is approximately 14% carbohydrates, 37% protein, and 49% fat.
How many calories are in an ounce of unsweetened soy milk?
One ounce (28 g) of unsweetened soy milk has 11 calories, with 1 g protein, 0.4 g carbs and 0.6 g fat. Four ounces (113 g) comes to 44 calories, and a full pound (454 g) to 177 calories.
How much unsweetened soy milk is 100 calories?
About 256 g of unsweetened soy milk supplies 100 calories, because it carries 0.39 kcal per gram (very low energy density). You can eat a large volume of this for very few calories, which makes it useful for filling out a meal in a deficit.
How much unsweetened soy milk do I need for 20 g of protein?
Roughly 556 g of unsweetened soy milk, which also brings 217 calories with it. That works out to 9.2 g of protein per 100 calories.
Is unsweetened soy milk high or low in calories for a beans & legume?
Unsweetened Soy milk sits 84% below the beans & legumes average of 244 kcal per 100 g, ranking 1st lowest of 20 in this category.
Is this nutrition data free to use?
Yes. The data is sourced directly from USDA FoodData Central (CC0 public domain). Viewing and scaling portions here is 100% free with no sign-up — and you can log this food free in our online food diary.