Yellow Squash: Calories, Nutrition and Health Benefits

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One cup of raw sliced yellow squash (127 g) has about 24 calories, 1.3 g protein, 4.9 g carbs, 1.3 g fiber, 3.7 g sugar and 0.3 g fat. It is about 94% water, so a big portion costs few calories. Butter or oil in the pan adds more calories than the squash itself.

Quick Nutrition Facts

Per 1 cup sliced, raw (127 g)

Nutrient	Amount
Calories	24 kcal
Protein	1.3g
Carbohydrates	4.9g
Fiber	1.3g
Sugars	3.7g
Fat	0.3g
Sodium	2.5 mg

Macronutrient Breakdown

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NUTRITIONIST'S INSIGHT

Yellow squash is a low-calorie, low-carb vegetable that is easy to overeat in a good way: a full cup is 24 calories and 4.9 g of carbs. The squash is rarely the problem. A tablespoon of butter or oil adds about 100 calories, which is four times the squash in the cup, so sauteed squash is mostly a fat decision. Protein is low at 1.3 g a cup, so pair it with eggs, chicken, fish or beans. Databases disagree a little, with 16 to 22 kcal per 100 g depending on the source and calorie factors, so treat the number as an estimate. Eat the skin, which is thin and holds some of the fiber, and choose small, firm squash, which have fewer seeds and a milder taste. Raw slices, a quick saute or a roast at high heat all keep the texture; long boiling turns it to mush and waters down the dish.

Myth Busters

MYTH #1: Yellow squash is a starchy vegetable like potato or winter squash

TRUTH: It is a summer squash picked young, with about 4.9 g of carbs a cup and 1.3 g of fiber. Winter squashes and potatoes carry several times that per cup. Squash, summer, crookneck and straightneck, raw: USDA SR Legacy, FDC 168464 (per 100 g and per 127 g cup)

MYTH #2: Yellow squash and zucchini are different nutritionally

TRUTH: They are close. Both are summer squash at about 19 kcal per 100 g, with roughly 3 to 4 g of carbs. Pick on taste and texture. Squash, summer, crookneck and straightneck, raw: USDA SR Legacy, FDC 168464 (per 100 g and per 127 g cup); Squash, summer, yellow, includes skin, raw: USDA entry (per 100 g)

MYTH #3: Cooking yellow squash makes it fattening

TRUTH: The squash does not gain calories when heated. The oil or butter does: a cup sauteed in butter will count the squash plus the added fat. Squash, summer, crookneck and straightneck, raw: USDA SR Legacy, FDC 168464 (per 100 g and per 127 g cup); USDA survey entry: summer squash, yellow or green, cooked with butter or margarine

MYTH #4: You should peel yellow squash

TRUTH: The skin is thin and edible, and the USDA entry is for squash with the skin on. Peeling removes some fiber and gives you nothing in return. Squash, summer, yellow, includes skin, raw: USDA entry (per 100 g)

NutriScore by Health Goals

Health Goal	NutriScore	Why This Score?
Weight Loss		24 calories a cup and about 94% water means a large plate for little energy. Measure the oil, since it adds more than the squash. Squash, summer, crookneck and straightneck, raw: USDA SR Legacy, FDC 168464 (per 100 g and per 127 g cup)
Muscle Gain		1.3 g of protein and 4.9 g of carbs a cup do little for training. It works as a side next to a protein dish. Squash, summer, crookneck and straightneck, raw: USDA SR Legacy, FDC 168464 (per 100 g and per 127 g cup)
Diabetes		About 4.9 g of carbs and 1.3 g of fiber a cup, and the ADA counts non-starchy vegetables as half the plate. Squash, summer, crookneck and straightneck, raw: USDA SR Legacy, FDC 168464 (per 100 g and per 127 g cup); What is the Diabetes Plate? Non-starchy vegetables fill half the plate (American Diabetes Association)
Heart Health		About 2.5 mg of sodium and 0.3 g of fat a cup. Keep it heart-friendly with olive oil and herbs instead of butter and salty cheese. Squash, summer, crookneck and straightneck, raw: USDA SR Legacy, FDC 168464 (per 100 g and per 127 g cup)
Low-Carb / Keto		About 3.6 g of net carbs a cup (4.9 g minus 1.3 g fiber) fits a low-carb plan, but several cups add up on strict keto. Squash, summer, crookneck and straightneck, raw: USDA SR Legacy, FDC 168464 (per 100 g and per 127 g cup)

PERSONALIZED NUTRITION

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Blood Sugar Response to Yellow Squash

A cup of raw yellow squash has about 4.9 g of carbs and 1.3 g of fiber, so it adds very little glucose. In a person with typical glucose handling, expect a rise of a few mg/dL within 30 to 45 minutes and a return to baseline within 2 hours. These are illustrative values, not a measured curve. The meal sets the curve: squash sauteed with eggs or chicken stays flat, while a breaded and fried squash casserole with a cracker topping can raise it. Squash, summer, crookneck and straightneck, raw: USDA SR Legacy, FDC 168464 (per 100 g and per 127 g cup); What is the Diabetes Plate? Non-starchy vegetables fill half the plate (American Diabetes Association)

Typical Glucose Response Curve

Not medical advice

How to flatten the spike

Pair squash with eggs, chicken, fish or beans so the meal digests slowly.
Roast or saute with a measured teaspoon or two of olive oil instead of breading or frying.
Skip cracker or breadcrumb toppings and sweet sauces, which carry most of the carbs in squash casseroles.
Leave the skin on and eat it before the starchy side.

Cultural Significance

Yellow squash, mainly the crookneck and straightneck types, is a staple of American summer gardens and Southern cooking. It is the base of squash casserole with cheese and crackers, fried squash and squash with onions, and it turns up in grilled vegetable platters and zucchini-style bread and fritters. Plants produce heavily in July and August, so neighbors often share extras, and the squash sells for little at farm stands and supermarkets through summer.

Compare & Substitute

Yellow Squash vs Similar Foods

Nutrient	Raw zucchini, 1 cup sliced (113 g)	Cooked spaghetti, 1 cup (140 g)	Cooked brown rice, 1 cup (195 g)
Calories	19 kcal	221 kcal	218 kcal
Protein	1.4g	8.1g	4.5g
Carbohydrates	3.5g	43.2g	45.8g
Fat	0.4g	1.3g	1.6g

Frequently Asked Questions

How many calories are in yellow squash?

A cup of raw sliced yellow squash (127 g) has about 24 calories, based on USDA data for summer squash at 19 kcal per 100 g. Other databases list 16 to 22 kcal per 100 g. Butter or oil added in cooking counts on top.

Is yellow squash low carb?

Yes. A cup has about 4.9 g of carbs and 1.3 g of fiber, so roughly 3.6 g of net carbs. That fits most low-carb plans.

Is yellow squash good for diabetes?

It is a non-starchy vegetable with about 4.9 g of carbs a cup, and the American Diabetes Association puts non-starchy vegetables on half the plate. Skip breading and sweet sauces.

Is yellow squash the same as zucchini nutritionally?

Nearly. Both are summer squash with about 19 kcal and 3 to 4 g of carbs per 100 g, so you can swap them in recipes without changing the numbers much.

Do cooked and raw yellow squash have the same calories?

Per gram, yes. Cooking adds nothing, but squash shrinks, so a cup of cooked squash holds more of it. Cooking with butter or oil adds the fat's calories.