Mozzarella is one of the most keto-friendly cheeses, but staying accurate with your macros still means knowing how many net carbs are in the exact portion you plan to eat. This calculator estimates net carbs for mozzarella in grams, ounces, slices, or shredded cups, using typical nutrition values for several mozzarella varieties — part-skim, whole milk, fresh, low-moisture, shredded, and skim-milk versions.
Net carbs are total carbohydrates minus fiber and sugar alcohols — the number that matters most for low-carb, keto, and diabetic meal planning. Mozzarella naturally contains very little carbohydrate, mostly from lactose, and almost always has zero fiber and zero sugar alcohols. If your package label shows different numbers, tick "Use values from my nutrition label" and enter the per-100-gram figures instead.
The result panel breaks down total carbs, fiber, sugar alcohols, net carbs, and — if you supply a daily target — what percentage of your daily net-carb budget that serving uses. Great for meal prep, macro logging, and quick portion checks.
🧀 Cheese & Serving Details
How to Use This Tool
Pick a serving unit, enter the amount, and choose the mozzarella variety that matches your package or recipe. The calculator converts slices, ounces, and shredded cups to grams automatically using standard portion weights: 1 slice ≈ 28 g, 1 cup shredded ≈ 112 g, 1 oz ≈ 28.35 g. Then it applies per-100-gram carb data from typical USDA-labelled cheese values. For a custom brand, tick the label box and enter the total carbohydrate, fiber, and sugar alcohol numbers from your package's nutrition facts panel — usually listed per 100 g or per serving.
Formula Explained
Net carbs are calculated as: Net Carbs = Total Carbohydrates − Fiber − Sugar Alcohols. Mozzarella contains almost no fiber or sugar alcohols, so for most varieties net carbs equal total carbs. Because the values are per 100 g, the calculator scales them by your actual serving weight: total carbs = (per-100-g carbs × serving grams) ÷ 100. If you provide a daily net-carb target (for example 20 g on a keto diet), the result panel also shows what percentage of that budget the serving uses.
Reference Table
Typical total carbohydrate values per 100 g for common mozzarella types (fiber and sugar alcohols are 0 g):
| Variety | Total Carbs / 100 g |
|---|---|
| Part-skim mozzarella | 2.8 g |
| Whole-milk mozzarella | 2.2 g |
| Low-moisture part-skim | 2.8 g |
| Fresh mozzarella / bocconcini | 2.2 g |
| Shredded mozzarella | 2.1 g |
| Smoked mozzarella | 2.3 g |
| Skim-milk mozzarella | 3.1 g |
Worked Examples
Example 1 – 1 oz part-skim mozzarella: 1 oz = 28.35 g. Per-100-g carbs = 2.8 g. Total carbs = 2.8 × 0.2835 = 0.79 g. Fiber and sugar alcohols = 0, so net carbs = 0.79 g.
Example 2 – 112 g shredded mozzarella (about 1 cup): total carbs = 2.1 × 1.12 = 2.35 g. Net carbs = 2.35 g.
Factors Affecting Accuracy
Package labels vary by brand and moisture content. Fresh mozzarella holds more water, so a weight-based serving may contain slightly fewer carbs than the same weight of drier, low-moisture cheese. Shredded cheese may contain anti-caking powder (often starch or cellulose), which can add a small amount of carbohydrate — check the ingredient list and use the label override when in doubt.
Frequently Asked Questions
Is mozzarella keto-friendly? Yes, in normal portions. A 28 g serving of part-skim mozzarella has about 0.8 g net carbs, and even a generous 100 g serving stays under 3 g net carbs — easy to fit into most low-carb plans.
Why does my label show carbs but this calculator doesn't match? Different brands and production methods can change lactose content slightly. Use the nutrition-label override to get an exact number for the product in your fridge.
Are sugar alcohols present in mozzarella? Naturally, no. If a flavored or processed mozzarella product lists sugar alcohols, subtract them using the same formula.
For authoritative nutrition data, see the USDA FoodData Central entry for "Mozzarella, low moisture, part-skim" and general food-label guidance at FDA's Nutrition Facts Label page.