Spaghetti Squash: Calories, Nutrition and Health Benefits

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One cup (155 g) of cooked spaghetti squash has 42 calories, 10 g of carbs, 2.2 g of fiber, 1 g of protein and 0.4 g of fat, per USDA. The same cup of cooked spaghetti has about 221 calories and 43 g of carbs, so the squash gives roughly one fifth of the calories and under a quarter of the carbs. It is a mild winter squash that works as a lighter base for sauce, not a one-to-one pasta match.

Quick Nutrition Facts

Per 1 cup, cooked (155 g)

Nutrient	Amount
Calories	42 kcal
Protein	1g
Carbohydrates	10g
Fiber	2.2g
Sugars	3.9g
Fat	0.4g
Sodium	28 mg

Macronutrient Breakdown

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NUTRITIONIST'S INSIGHT

Plain spaghetti squash is about 92% water, which is why a full cup is only 42 calories. The trade-off is that it fills you up less than pasta and carries almost no protein. Most of the calories in a real plate come from what goes on top: a tablespoon of olive oil adds about 120 calories and a quarter cup of parmesan about 100, so a dressed bowl can reach 250 to 350 calories. Pair it with chicken, turkey meatballs, eggs or beans to make a meal, and roast it cut side down so the strands stay firm and not watery.

Myth Busters

MYTH #1: Spaghetti squash has the same carbs as pasta

TRUTH: A cup of cooked spaghetti squash has 10 g of carbs. A cup of cooked spaghetti has about 43 g. The squash is lower, but it is not zero-carb, so people counting carbs should still log it. Squash, winter, spaghetti, cooked, boiled, drained, or baked, without salt; Pasta, cooked, enriched, without added salt

MYTH #2: Spaghetti squash is a high-protein swap for pasta

TRUTH: A cup has about 1 g of protein, against roughly 8 g in cooked spaghetti. Swapping loses protein, so add chicken, fish, eggs, beans or cheese to the plate. Squash, winter, spaghetti, cooked, boiled, drained, or baked, without salt; Pasta, cooked, enriched, without added salt

MYTH #3: All winter squash has about the same calories

TRUTH: Spaghetti squash is among the lightest. A cup of mashed acorn squash has about 83 calories, double the 42 in a cup of spaghetti squash. Squash, winter, spaghetti, cooked, boiled, drained, or baked, without salt; Spaghetti Squash Nutrition Facts and Health Benefits

MYTH #4: Spaghetti squash spikes blood sugar like pasta

TRUTH: With about 10 g of carbs and 2.2 g of fiber per cup, a plain serving is a small carb load and is generally described as low glycemic. Sauces with sugar and large portions change that. Squash, winter, spaghetti, cooked, boiled, drained, or baked, without salt; What Happens to Your Blood Sugar When You Eat Spaghetti Squash

NutriScore by Health Goals

Health Goal	NutriScore	Why This Score?
Weight Loss		42 calories per cup and 2.2 g of fiber let you build a large, low-calorie plate. Healthline notes it works as a low-calorie base in gratins, casseroles and pasta dishes. Squash, winter, spaghetti, cooked, boiled, drained, or baked, without salt; Spaghetti Squash Nutrition Facts: Calories, Carbs, and Uses
Blood Sugar Control		About 10 g of carbs and 2.2 g of fiber per cup is a gentle load and it is described as a low-glycemic food. Watch the sauce, since jarred sauces add sugar. Squash, winter, spaghetti, cooked, boiled, drained, or baked, without salt; What Happens to Your Blood Sugar When You Eat Spaghetti Squash
Muscle Gain		About 1 g of protein per cup is too little to count toward a protein target. It works only as a low-calorie base under a protein-rich topping. Squash, winter, spaghetti, cooked, boiled, drained, or baked, without salt
Low Carb Eating		10 g of total carbs (about 7.8 g net) per cup is far under pasta's 43 g, but it is too high for strict keto at larger portions. Squash, winter, spaghetti, cooked, boiled, drained, or baked, without salt; Pasta, cooked, enriched, without added salt
Satiety		Fiber helps, but at 42 calories a cup it is low in energy density and protein, so a bowl alone may not keep you full for long. Spaghetti Squash Nutrition Facts: Calories, Carbs, and Uses; Squash, winter, spaghetti, cooked, boiled, drained, or baked, without salt

PERSONALIZED NUTRITION

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Blood Sugar Response - Spaghetti Squash (1 cup cooked, 155 g)

One cup of plain cooked spaghetti squash has about 10 g of carbs and 2.2 g of fiber, a small load. Most healthy adults see a mild rise of about 10 to 15 mg/dL that peaks near 45 minutes and returns to baseline within two hours. Squash, winter, spaghetti, cooked, boiled, drained, or baked, without salt; What Happens to Your Blood Sugar When You Eat Spaghetti Squash

Estimated Blood Glucose Response (mg/dL)

Illustrative curve for a healthy adult eating one plain cup. It is an estimate from the carb and fiber content, not a measured trace. Sugary sauce, bigger portions or insulin resistance change the result.

How to flatten the spike

Add protein such as chicken, meatballs or eggs, which slows how fast the carbs are absorbed
Choose a sauce with no added sugar, since jarred sauces can carry 6 to 10 g per half cup
Count about 10 g of carbs per cup if you track carbs
Cook it cut side down and keep it firm; a soggy overcooked squash makes it easy to overeat
Eat a few bites of non-starchy vegetables or a salad first

Cultural Significance

Spaghetti squash is a winter squash (Cucurbita pepo) whose flesh pulls apart into spaghetti-like strands after cooking. It is native to the Americas, like other squash, and became a common pasta stand-in in North American kitchens as low-carb and gluten-free eating spread.

It is typically baked or roasted in halves at 400°F (200°C) for 40 to 50 minutes, then scraped with a fork. It also cooks in a microwave, steamer or Instant Pot, and shows up under marinara, pesto, garlic butter, chicken Alfredo and baked casseroles, especially in fall.

Compare & Substitute

Spaghetti Squash vs Similar Foods

Nutrient	Cooked spaghetti (1 cup, 140 g)	Zucchini noodles (1 cup, cooked, about 180 g)	Cooked acorn squash (1 cup, mashed, 245 g)
Calories	221 kcal	27 kcal	83 kcal
Protein	8.1g	2g	1.8g
Carbohydrates	43.2g	5g	21.6g
Fat	1.3g	0.4g	0.3g

Frequently Asked Questions

How many calories are in spaghetti squash?

One cup (155 g) of cooked spaghetti squash has 42 calories. Per 100 g that is about 27 calories. Oil, butter, cheese and sauce add to this.

How many carbs are in a cup of spaghetti squash?

A cup of cooked spaghetti squash has 10 g of carbs, 2.2 g of fiber and 3.9 g of sugar, so about 7.8 g of net carbs.

Is spaghetti squash healthier than pasta?

It has about 42 calories and 10 g of carbs per cup against roughly 221 calories and 43 g for cooked spaghetti, and more vitamin C and B6. It has much less protein, and less iron and niacin, so it is lower in calories, not better in every nutrient.

Does spaghetti squash raise blood sugar?

Plain spaghetti squash raises blood sugar slowly because a cup has only about 10 g of carbs and 2.2 g of fiber. Added sugar in sauces and big portions will raise it more.

Is spaghetti squash good for weight loss?

It can help, since it is low in calories and has fiber that slows stomach emptying. It has little protein, so pair it with a lean protein to stay full.

How do you cook spaghetti squash?

Halve it lengthwise, scoop out the seeds, brush with a little oil and roast cut side down at 400°F (200°C) for 40 to 50 minutes until fork-tender, then scrape out the strands. It also cooks in a microwave, steamer, slow cooker or Instant Pot.