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How many carbs are in 1/3 of a cucumber?

4 min read

According to the FDA, one-third of a medium cucumber, weighing approximately 99 grams, contains around 3.6 grams of carbohydrates. This makes understanding how many carbs are in 1/3 of a cucumber essential for anyone counting their macros or following a low-carb eating plan.

Quick Summary

A one-third portion of a medium-sized cucumber typically contains a minimal amount of carbohydrates, usually around 3 to 4 grams. Its high water content and low calorie count make it a perfect, hydrating snack for those managing their carbohydrate intake or on a weight-loss journey.

Key Points

  • Low Carb Count: A 1/3 portion of a medium cucumber contains approximately 3-4 grams of total carbohydrates, making it a very low-carb food.

  • Net Carbs are Minimal: When dietary fiber is accounted for, the net carb count is even lower, making it ideal for keto and other low-carb diets.

  • Peel Matters: Keeping the peel on increases the fiber and nutrient content slightly, offering more benefits with minimal extra carbohydrates.

  • Rich in Water: With about 95% water, cucumbers are an excellent source of hydration, supporting digestive health and bodily functions.

  • Source of Nutrients: Cucumbers provide important vitamins and minerals, including vitamin K for bone health and antioxidants to fight inflammation.

  • Highly Versatile: This vegetable can be easily incorporated into a variety of dishes, including salads, wraps, and infused water.

In This Article

The Carbohydrate Count in a Third of a Cucumber

For those tracking their carbohydrate intake, a third of a cucumber is an excellent choice for a low-carb snack. The exact carb content can vary slightly depending on the size and variety of the cucumber, but it remains consistently low. Based on data from the USDA, a 100-gram serving of raw, unpeeled cucumber contains approximately 3.6 grams of carbohydrates. Given that a third of a medium cucumber is close to this weight, it's a reliable estimate for your macro tracking. This minimal carb load, combined with its high water content, means you can enjoy a crisp, refreshing snack without a significant impact on your daily carb limits.

The Importance of Peeling

When considering the nutritional content of a cucumber, it's worth noting whether or not the peel is included. The peel of a cucumber, particularly in smaller varieties, contains a significant portion of its nutrients, including fiber. According to one source, a half-cup of sliced cucumber with the peel provides almost 2 grams of carbohydrates, including 0.3 grams of fiber. By contrast, another source indicates that 1 cup of sliced, peeled, raw cucumber contains about 2.6g of carbs with 0.8g of fiber. This shows that keeping the peel on can increase the fiber content, which is beneficial for digestion, but also adds a small amount of additional carbohydrates. However, for most low-carb diets, this difference is negligible, and the added fiber and nutrients from the peel are worthwhile.

The Breakdown: Net Carbs and Fiber

For those on a keto or other very-low-carb diet, net carbs are the key metric. Net carbs are calculated by subtracting the dietary fiber from the total carbohydrates. Since cucumbers contain a small amount of fiber, their net carb count is even lower than their total carb count. For example, if a serving has 3.6 grams of total carbs and 0.5 grams of fiber, the net carbs would be just 3.1 grams. This makes cucumbers a very keto-friendly vegetable that can help you feel full without consuming many carbohydrates.

Beyond Carbs: Other Nutritional Benefits

Cucumbers offer more than just a low-carb profile. They are packed with beneficial nutrients that contribute to overall health. Their high water content, which makes up about 95% of their mass, is excellent for hydration. Cucumbers also provide a good source of vitamin K, which is crucial for blood clotting and bone health. Other nutrients include small amounts of vitamin C, potassium, and magnesium.

Some of the specific health benefits associated with cucumbers include:

  • Hydration: Essential for maintaining a healthy intestine and preventing constipation.
  • Bone Health: The combination of vitamin K and a small amount of calcium supports bone strength.
  • Antioxidants: Cucumbers contain compounds like flavonoids and tannins, which help combat oxidative stress and fight free radicals.
  • Skin Benefits: Applied topically, cucumber slices can soothe skin, reduce swelling, and ease sunburn pain.

Versatile Ways to Incorporate Cucumber

Cucumbers are incredibly versatile and easy to add to a variety of meals and snacks. Here are a few low-carb ideas to get you started:

  • Snacks: Enjoy plain slices with a sprinkle of salt and pepper, or dip them in a low-carb hummus or cream cheese spread.
  • Salads: Add chopped cucumber to any salad for a refreshing crunch.
  • Wraps: Use thin, long slices of cucumber as a carb-free alternative to tortillas or bread for wraps.
  • Infused Water: Add cucumber slices to your water with a sprig of mint for a refreshing, hydrating drink.
  • Smoothies: Blend cucumber into a green smoothie for added nutrients and hydration without a lot of calories.
  • Garnishes: Use cucumber slices as a garnish for meals or cocktails.

Comparison of Different Cucumber Portions

To better illustrate the carb content, here is a comparison table showing various servings based on nutritional data:

Serving Size Approximate Weight Total Carbohydrates Dietary Fiber Net Carbs Notes
1/3 Medium Cucumber ~99 g 3.6 g ~0.5 g ~3.1 g With peel
1 Cup, Sliced (Peeled) ~104 g 2.6 g 0.8 g 1.8 g Very low in net carbs
1 Cup, Sliced (Unpeeled) ~119 g 3.9 g 0.6 g 3.3 g Higher fiber
1/2 Cup, Sliced (Unpeeled) ~52 g 1.9 g 0.3 g 1.6 g A common small serving
Whole Medium Cucumber ~300 g 6 g 1 g 5 g Full of hydration

Conclusion

In summary, the number of carbs in 1/3 of a cucumber is very low, making it an excellent food choice for almost any diet. With just a few grams of total carbohydrates and even fewer net carbs, it provides a hydrating, nutrient-dense snack that is particularly well-suited for low-carb and ketogenic lifestyles. Whether you eat it peeled or unpeeled, sliced or whole, the humble cucumber offers a healthy, guilt-free way to boost your vegetable intake. Its versatility in the kitchen allows for easy integration into a variety of dishes, from simple snacks to complex salads, making it a staple for anyone prioritizing health and good nutrition.

Frequently Asked Questions

Yes, cucumbers are highly suitable for a ketogenic diet because they are very low in both calories and net carbohydrates. A typical serving contains minimal net carbs, making it a safe and hydrating addition to your keto meal plan.

Peeling a cucumber will slightly reduce its carb content, as some fiber is located in the skin. However, the difference is very small, and keeping the peel on provides additional fiber and nutrients like vitamin K.

The carbohydrates in cucumbers consist mainly of natural sugars and a small amount of dietary fiber. The fiber portion is beneficial for digestion and helps keep the net carb count low.

Cucumbers have a very low glycemic index (GI) of around 15, which means they have a minimal impact on blood sugar levels. This makes them a great snack for people managing diabetes.

Cucumbers are among the lowest-carb vegetables, comparable to leafy greens like spinach and lettuce. They are significantly lower in carbs than starchy vegetables such as potatoes or corn.

While the carb content is very similar across different varieties like English and American cucumbers, there can be minimal differences based on their size and water content. The nutritional profile remains generally consistent, though.

For most people, eating cucumbers in moderation is safe and healthy. However, those on blood-thinning medication like warfarin should monitor their vitamin K intake, and eating very large amounts might lead to digestive discomfort in some individuals.

References

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Medical Disclaimer

This content is for informational purposes only and should not replace professional medical advice.