Wondering how many carbs are in butternut, acorn, or spaghetti squash? This calculator gives you the carb content of any serving of squash normalized to 100 grams, so you can compare varieties at a glance. Enter a portion size, choose your squash, and get total carbohydrates, fiber, and net carbs instantly.
Because squash ranges from low-carb summer varieties like zucchini to starchier winter squashes like butternut, the difference is significant. This tool uses standard USDA nutrition values for each type and converts grams to ounces if needed.
Whether you’re tracking macros, following a low-carb or keto diet, or just building a balanced plate, this quick reference helps you log accurately. Use it for meal prep, portion logging, or comparing recipes side by side before you cook.
🟠 Squash Carbs Calculator
Find total carbs, fiber, and net carbs for your favorite squash.
How to Use This Tool
Start by selecting the squash variety you're eating from the dropdown. If you're not sure, check the reference table below or use the closest match (for example, 'yellow summer squash' for pattypan and yellow crookneck). Enter the amount you plan to eat, choosing grams or ounces. The calculator converts ounces to grams automatically using 1 oz = 28.35 g.
Optionally tick 'Subtract fiber' to see net carbs — the carbohydrate grams that remain after fiber is removed. This is a common metric for low-carb and keto eaters. Press 'Calculate Carbs' and the results panel shows total carbs, fiber, net carbs, and the step-by-step math.
The quick-fill buttons (100 g, 150 g, 200 g, 1 lb) are handy if you're weighing food on a scale or estimating from a recipe. For diced squash, 1 cup is roughly 150-180 g depending on cube size and variety.
Carb Values by Squash Variety
The table below shows typical values for raw squash per 100 grams, based on USDA FoodData Central entries. Values are rounded to one decimal place.
| Variety | Total Carbs (g) | Fiber (g) | Net Carbs (g) |
|---|---|---|---|
| Butternut squash | 11.7 | 2.0 | 9.7 |
| Acorn squash | 10.4 | 1.5 | 8.9 |
| Delicata squash | 11.9 | 2.0 | 9.9 |
| Spaghetti squash | 6.9 | 1.5 | 5.4 |
| Pumpkin | 6.5 | 0.5 | 6.0 |
| Yellow summer squash | 3.4 | 1.1 | 2.3 |
| Zucchini | 3.1 | 1.0 | 2.1 |
Winter squashes (butternut, acorn, delicata) are starchier and more carbohydrate-dense, while summer squashes (zucchini, yellow) are mostly water. If you're comparing products, always check the nutrition label for the specific brand, especially for pre-cut or frozen squash.
How the Calculation Works
The formula is simple: carbs = serving weight (g) × carbs per 100g ÷ 100. For example, if you eat 200 g of butternut squash at 11.69 g carbs per 100 g: 200 × 11.69 ÷ 100 = 23.4 g carbs.
Fiber is subtracted to get net carbs: net carbs = total carbs − fiber. Fiber is a type of carbohydrate that isn't fully digested and absorbed, so many low-carb trackers exclude it from their daily count. The same formula is used for fiber itself.
Worked Examples
Example 1 — Roasted butternut, 250 g: 250 × 11.69 ÷ 100 = 29.2 g total carbs. Fiber: 250 × 2.0 ÷ 100 = 5.0 g. Net carbs = 29.2 − 5.0 = 24.2 g.
Example 2 — Zucchini noodles, 1 medium (196 g): 196 × 3.11 ÷ 100 = 6.1 g total carbs. Fiber: 196 × 1.0 ÷ 100 = 2.0 g. Net carbs = 4.1 g.
Example 3 — Spaghetti squash, 8 oz cooked: 8 oz is 226.8 g. 226.8 × 6.91 ÷ 100 = 15.7 g total carbs, about 10.8 g net carbs after 3.4 g fiber.
Tips & Common Mistakes
- Don't use cup measures for weight. A cup of diced butternut can range from 140 g to 180 g depending on cube size. A kitchen scale is more accurate for macros.
- Raw vs cooked. If your recipe calls for cooked squash, a cup of mashed or cubed cooked squash weighs more per volume because water is removed. Weigh what you actually put on your plate.
- Check added ingredients. Roasting with honey, maple syrup, or brown sugar adds carbs that this calculator doesn't account for. Track those separately.
- Net carbs aren't a universal standard. Some diet plans count total carbs only, while low-carb and keto plans often use net carbs. Choose the one that matches your approach.
- Frozen vs fresh. Frozen squash is usually just fresh squash that's been blanched, so carb values are similar, but check labels for sauces or seasonings.
Frequently Asked Questions
Is squash keto-friendly? It depends on the variety and your carb limit. Zucchini and yellow summer squash are low enough for most keto plans at about 2-3 g net carbs per 100 g. Butternut and acorn are higher at roughly 9-10 g net carbs per 100 g, so portions need to be small.
Why does spaghetti squash have fewer carbs than butternut? Spaghetti squash has a higher water content and forms long strands when cooked; butternut is denser and starchier. The USDA nutrient database confirms that difference, which is why it's a popular pasta substitute.
Can I use this calculator for canned pumpkin? Canned pumpkin is more concentrated than raw pumpkin. A typical 100 g serving of canned pumpkin has about 8-9 g carbs, so use the raw values only for fresh pumpkin. Check the label for exact numbers.
Should I weigh squash raw or cooked? For the most consistent tracking, weigh raw before cooking. If you track cooked weight, use this calculator's grams option with your cooked weight, but be aware the nutrient density per gram increases as water evaporates. The total carbs in the whole portion remain the same.
For a complete calorie picture, pair this carb calculator with our squash calorie calculator to see energy content alongside macros.