Noodles are a staple in kitchens worldwide, but their carbohydrate content varies dramatically depending on the type, ingredients, and preparation method. Whether you're tracking macros, managing blood sugar, or simply curious about your favorite pasta, this calculator gives you the total carbs and net carbs per 100 grams for a wide range of noodle varieties.
Simply select your noodle type, enter the serving size (in grams or ounces), and optionally adjust for cooked vs. dry weight. The tool instantly calculates total carbohydrates, net carbs (subtracting fiber), and even provides a per-serving breakdown. Perfect for meal planning, keto or low-carb diets, and anyone who wants precise nutrition data without guesswork.
🍜 Noodle Carb Calculator
How to Use This Tool
Select your noodle type from the dropdown — options include dry and cooked forms of spaghetti, ramen, soba, rice noodles, egg noodles, udon, plus low-carb alternatives like shirataki and zucchini noodles. Enter the amount you plan to eat, choosing grams or ounces. The calculator automatically converts ounces to grams (1 oz = 28.35 g) and applies the correct per-100g values for the selected noodle.
Check the "Show net carbs" box if you want to see net carbohydrates (total carbs minus fiber), which is useful for low-carb and keto diets. Click Calculate to see your results, including total carbs, fiber, net carbs, and the per-100g reference. Use the quick-fill buttons to instantly set common serving sizes like 100 g or 3 oz.
How It Works
The calculator uses standard USDA nutrition data for each noodle type. For dry noodles, the values reflect the uncooked product; for cooked noodles, they reflect the boiled product (which absorbs water and thus has lower carbs per 100g). The formula is simple:
Total carbs = (carbs per 100g × grams) / 100
Net carbs = Total carbs − Fiber
For example, 100 g of dry spaghetti contains about 75 g of carbs and 3.2 g of fiber, giving 71.8 g net carbs. The same weight of cooked spaghetti has only 25 g carbs because water dilutes the nutrients.
Worked Examples
Example 1: You eat 200 g of cooked ramen. Carbs per 100g = 22 g, so total carbs = 22 × 2 = 44 g. Fiber = 0.9 × 2 = 1.8 g. Net carbs = 44 − 1.8 = 42.2 g.
Example 2: You have 85 g (3 oz) of dry soba noodles. Convert to grams: 85 g. Carbs = 70 × 0.85 = 59.5 g. Fiber = 3.0 × 0.85 = 2.55 g. Net carbs = 56.95 g.
Example 3: A 150 g serving of shirataki noodles has only 3 g carbs per 100g, so total carbs = 4.5 g, fiber = 3 g, net carbs = 1.5 g — a great low-carb option.
Tips & Best Practices
- Always check whether your noodle is dry or cooked — the difference is huge. Dry pasta roughly doubles in weight when cooked, so 100 g dry becomes about 200 g cooked.
- For accurate tracking, weigh your noodles before cooking if you're using dry values, or after cooking if using cooked values.
- If you're on a keto diet, focus on net carbs and consider shirataki or zucchini noodles, which have minimal impact.
- Remember that sauces, oils, and toppings add extra carbs and calories — this calculator only covers the noodles themselves.
Factors Affecting Accuracy
Nutritional values can vary slightly between brands and preparation methods. For example, enriched pasta may have slightly different micronutrient content, and cooking time affects water absorption. The data here is based on generic USDA reference values, which are reliable for most planning purposes. If you need precise numbers for a specific product, check the nutrition label on the package.
Frequently Asked Questions
Why do cooked noodles have fewer carbs per 100g? Because cooking adds water, which increases weight without adding carbs. The total carbs in your serving stay the same, but the concentration per 100g drops.
Are all noodles high in carbs? Most traditional noodles are high in carbs, but shirataki (konjac) and vegetable noodles like zucchini are very low. Check the per-100g values in the calculator to compare.
What is net carbs? Net carbs are the carbohydrates that your body actually digests and absorbs. Fiber is subtracted because it isn't broken down into sugar. This is a common metric for low-carb diets.
Can I use this for meal prep? Absolutely. Calculate the carbs for your planned portions and multiply by the number of servings to plan your weekly meals.
Additional Resources
For more detailed nutrition data, visit the USDA FoodData Central database, which provides comprehensive nutrient profiles for thousands of foods. You can also consult the American Diabetes Association for guidance on carbohydrate counting and meal planning.