Skim milk is one of the lowest-calorie dairy choices you can pour into a glass, yet it still delivers satisfying protein, calcium, and a solid dose of B vitamins. This calculator makes it easy to estimate the calories and macronutrients in any amount of skim milk measured in cups. Whether you are tracking a daily calorie budget, logging macros, planning a high-protein snack, or simply comparing milk options, the tool gives you a quick, reliable breakdown of energy, protein, carbohydrates, sugars, and fat.
The calculations are based on standard USDA nutrition values for nonfat skim milk: roughly 83 calories per US cup. You can also switch to skim milk with added nonfat milk solids or low-fat 1% milk, or enter the calorie value printed on your own carton. Results show the total for your number of cups, per-cup energy, calories per 100 ml, and a full macro breakdown.
🥛 Skim Milk Calories per Cup Calculator
Estimate calories, protein, carbs, and fat for any amount of skim milk.
Results are estimates based on standard USDA nutrition values for fluid milk.
How to Use This Tool
Start by typing the number of cups of skim milk you drank or used in a recipe. You can enter decimals like 0.75 or 1.5. Next, choose the milk type from the dropdown. The default, skim / nonfat milk, uses 83 kcal per cup, the standard USDA value for nonfat fluid milk. If your carton is enriched with extra nonfat milk solids, choose the second option; if you are comparing with low-fat 1% milk, choose the third. For a custom product, enter the calories per cup shown on the nutrition label and the calculator will use that value for the calorie totals.
- Standard skim: 83 kcal per cup, 8.3 g protein, 12.2 g carbs, 0.2 g fat.
- Skim with added solids: 90 kcal per cup, 9.0 g protein, 13.4 g carbs, 0.2 g fat.
- Low-fat 1%: 102 kcal per cup, 8.2 g protein, 12.2 g carbs, 2.4 g fat.
- Custom label value: overrides calories, macros shown are standard for the selected milk type.
Remember that a standard US cup in nutrition is 240 ml. If your measuring cup is smaller or larger, use the quick buttons or decimals to stay accurate.
Why Skim Milk Is So Low in Calories
Milk fat is the most calorie-dense component in milk. Skim milk is produced by removing most of the butterfat, leaving about 0.1 to 0.2 grams of fat per cup. That removal drops the energy content dramatically compared with whole milk, which provides about 149 kcal per cup. The protein and carbohydrate content stay roughly the same, which is why skim milk is popular with people who want the nutritional benefits of dairy without the extra fat calories.
Skim milk is also about 90 percent water, so it contributes to hydration. The carbohydrate in skim milk is mostly lactose, a natural milk sugar. People sometimes assume skim means it has added sugar, but the sugar is naturally occurring lactose; no table sugar is added in plain skim milk. This calculator shows sugars separately so you can see the true nutritional picture. For broader guidance, the Dietary Guidelines for Americans include plain milk as part of a healthy eating pattern.
Worked Examples
Example 1 — Breakfast cereal. You pour 1 cup of skim milk over oatmeal. Total: 83 kcal, 8.3 g protein, 12.2 g carbs, 0.2 g fat. If you use 1.5 cups, multiply: about 125 kcal, 12.5 g protein, 18.3 g carbs, 0.3 g fat.
Example 2 — Protein shake. You add 2 cups of skim milk to a post-workout shake. Total: 166 kcal, 16.6 g protein, 24.4 g carbs, 0.4 g fat. That is a useful protein boost for only about 166 kcal.
Example 3 — Comparison with 1%. A 1.5-cup latte made with low-fat 1% milk provides about 153 kcal, while the same latte with skim milk provides about 125 kcal — a saving of around 28 kcal before adding coffee or flavorings.
For a custom label value, replace the per-cup number in the example. For instance, if your brand lists 90 kcal per cup, then 2 cups = 180 kcal.
Standard Nutrition Reference per Cup
The table below summarizes the nutrient values used by the calculator. All values are per one US cup (240 ml).
| Milk Type | Calories | Protein (g) | Carbs (g) | Sugars (g) | Fat (g) |
|---|---|---|---|---|---|
| Skim / nonfat | 83 | 8.3 | 12.2 | 12.3 | 0.2 |
| Skim with added solids | 90 | 9.0 | 13.4 | 13.1 | 0.2 |
| Low-fat 1% | 102 | 8.2 | 12.2 | 12.3 | 2.4 |
| Whole milk (for context) | 149 | 7.7 | 11.7 | 12.3 | 8.0 |
Values are adapted from USDA FoodData Central entries for fluid milk. Actual products can vary slightly depending on fortification and brand formulation.
Tips for More Accurate Tracking
- Use the nutrition label on your actual carton whenever possible, because brands may fortify with extra protein or milk solids.
- Measure with a standard liquid measuring cup rather than estimating by eye. Skim milk can be part of a healthy diet, but accurate tracking helps you meet energy and protein goals.
- If you use a food scale, note that 1 cup of skim milk weighs about 245 g. You can weigh 245 g instead of using a cup measure.
- For coffee or tea, remember that a typical grande drink is about 16 fluid ounces, or 2 cups, before adding espresso and syrup.
- Do not confuse calories per cup with calories per 100 ml; the calculator shows both to help you adapt to international labels.
If you are counting net carbs, you can subtract fiber from total carbs. Skim milk has essentially no fiber, so net carbs are about the same as total carbs.
Frequently Asked Questions
Is skim milk really only 83 calories per cup? For standard nonfat fluid milk, yes. The USDA lists about 83 kcal per 240 ml cup for milk, nonfat, fluid. Variations occur when milk solids, flavorings, or protein fortifiers are added.
Should I track sugary flavored skim milk with this tool? No. Chocolate or strawberry flavored milks contain added sugar and should be tracked separately using their label values. This calculator is for plain skim milk only.
Does skim milk have more carbs than whole milk? In most cases skim milk has slightly more carbohydrates per cup because removing fat leaves a marginally higher proportion of carbohydrate by weight. The difference is small; both are primarily lactose-based.
Can I use this for a 250 ml metric cup? If you measure a 250 ml cup, the energy is about 4 percent higher than a 240 ml cup. Multiply your total by 250/240 or simply use 1.042 cups in the calculator.