Skip to content

What is the lowest calorie fruit per 100 grams? Rhubarb and Other Low-Calorie Options

4 min read

With approximately 21 calories per 100 grams, raw rhubarb is one of the lowest calorie fruit options available. However, botanically, cucumber (around 16 calories) and tomato (around 18 calories) are also classified as fruits and are even lower in calories. For traditional fruits, watermelon and strawberries are also top contenders, making understanding what is the lowest calorie fruit per 100 grams essential for calorie-conscious diets.

Quick Summary

This guide reveals the lowest calorie fruits, focusing on rhubarb and other contenders like watermelon and berries. It details the nutritional benefits, calorie content, and practical ways to incorporate these low-energy fruits into your daily diet for better health and weight management. Key details on caloric density and hydration are also provided.

Key Points

  • Rhubarb is one of the lowest calorie fruits: Raw rhubarb contains approximately 21 calories per 100 grams, though it is often considered a vegetable.

  • Watermelon and strawberries are top contenders: With about 30-32 calories per 100 grams, watermelon and strawberries are excellent, hydrating low-calorie fruit options.

  • Botanically, cucumber is even lower: As a botanical fruit, cucumber is among the lowest in calories, with only about 16 calories per 100 grams.

  • Berries offer a low-calorie, high-fiber boost: Varieties like raspberries and blackberries are packed with fiber, promoting fullness and aiding digestion while remaining low in calories.

  • High water content equals low calories: Fruits with high water content, such as watermelon and citrus fruits, naturally have a lower caloric density, helping with hydration and satiety.

  • Substitution is key for weight management: Eating low-calorie fruits instead of higher-calorie snacks can help reduce overall calorie intake and support weight loss.

In This Article

Discovering the Lowest Calorie Fruits

When managing weight or simply aiming for a healthier diet, choosing foods with a low caloric density is crucial. For fruits, this often correlates with a high water content. While many consider strawberries or watermelon the lightest, a deeper look at nutritional data reveals some lesser-known champions. This article explores the very lowest calorie fruits and provides a comprehensive guide to incorporating them into your daily eating plan.

Rhubarb: A Surprising Contender

Rhubarb, commonly used in desserts, is technically a vegetable but is often prepared and consumed like a fruit. Raw rhubarb contains only about 21 calories per 100 grams, placing it among the lowest on the list. Its very low calorie count is due to its high fiber and water content. Rhubarb is also a notable source of Vitamin K, which is important for bone health and blood clotting. However, it's essential to only consume the stalks, as the leaves are toxic due to high levels of oxalic acid.

The Top Low-Calorie Fruits

Watermelon

Watermelon is renowned for being refreshing and hydrating, with its calorie content reflecting this. At roughly 30 calories per 100 grams, watermelon is over 90% water. This high water content helps you feel full without consuming many calories, making it an excellent snack for weight loss. It also provides essential vitamins, such as Vitamin A and C, and antioxidants like lycopene.

Strawberries

Strawberries are another popular, nutrient-dense choice. A 100-gram serving of strawberries contains approximately 32 calories. They are a great source of Vitamin C, manganese, folate, and powerful antioxidants, which have anti-inflammatory effects. Their high fiber content further contributes to a feeling of fullness.

Berries: The Powerhouses

While strawberries and raspberries are specific low-calorie gems, the berry family as a whole is a fantastic low-calorie addition to any diet. A 100-gram serving of raspberries has about 52 calories, but also an impressive 6.5 grams of fiber, which is known to aid satiety. Blackberries come in at around 43 calories per 100 grams and are rich in vitamins and phytochemicals with anti-inflammatory properties.

Citrus Fruits

Citrus fruits like lemons and grapefruit are also exceptionally low in calories. A 100-gram portion of lemon has about 29 calories, while pink or red grapefruit typically contains around 30 calories. Both are packed with Vitamin C and water, which supports hydration. While oranges are slightly higher at around 46-49 calories per 100 grams, they still offer excellent nutritional value.

Comparison Table of Low-Calorie Fruits (per 100g)

Fruit Calories (kcal) Water Content (%) Fiber (g)
Rhubarb (Raw) ~21 High High
**Cucumber*** ~16 95-96% N/A
**Tomato*** ~18 ~95% High
Watermelon ~30 >90% Low
Strawberries ~32 ~91% 2
Grapefruit ~30-32 ~88% ~1.7
Raspberries ~52 High 6.5
Blackberries ~43 High 8

*Note: Cucumber and tomato are botanically fruits but are often used culinarily as vegetables.

How to Incorporate Low-Calorie Fruits into Your Diet

Including low-calorie fruits is simple and delicious. The key is to make them easily accessible and a natural part of your daily routine. Here are some easy ways to integrate them:

  • Snack Smart: Keep a bowl of pre-washed strawberries, raspberries, or cut melon in the fridge for easy, guilt-free snacking. When you crave something sweet, reaching for a piece of fruit is a much healthier option than processed junk food.
  • Boost Your Breakfast: Add berries or diced rhubarb (cooked) to your morning oatmeal, Greek yogurt, or whole-grain cereal. This not only adds flavor and sweetness but also a significant fiber boost to keep you feeling full.
  • Create Hydrating Drinks: Infuse your water with slices of low-calorie fruits like lemon, watermelon, or berries. For a more substantial option, blend them into a smoothie with some plain yogurt for a nutrient-dense and hydrating meal.
  • Enhance Salads: Add slices of grapefruit or strawberries to your salads for a burst of flavor and color. The sweet and tangy taste can complement savory greens and proteins perfectly.
  • Make Healthy Desserts: Instead of high-calorie sweets, try grilling peaches or serving berries with a light dollop of cream. Roasted rhubarb with a little honey and cinnamon is also a delicious and healthy dessert.

Conclusion

While raw rhubarb technically holds the crown for the lowest calorie traditional 'culinary' fruit, the title belongs to cucumber when considering botanical classifications. However, popular options like watermelon, strawberries, and grapefruit all offer exceptional low-calorie benefits. The true takeaway is that focusing on high-water, high-fiber, and nutrient-dense fruits is key to managing weight and improving overall health. By swapping out high-calorie snacks for these flavorful and healthy fruits, you can enjoy delicious food while staying on track with your wellness goals. Remember, the goal is not to eliminate calories but to choose them wisely for maximum nutritional benefit and satiety. To learn more about incorporating healthy foods into your life, visit the Centers for Disease Control and Prevention's guidance on healthy eating for weight management.

Frequently Asked Questions

Botanically, cucumber is one of the lowest calorie fruits, containing only about 16 calories per 100 grams due to its very high water content. For fruits that are culinarily recognized as such, raw rhubarb is the lowest, at around 21 calories per 100 grams.

While watermelon is one of the most well-known low-calorie fruits at approximately 30 calories per 100 grams, others like rhubarb, cucumber, and tomato are technically lower.

Many of the lowest-calorie fruits are also low in sugar due to their high water content. Examples include rhubarb, lemons, and strawberries, which contain relatively low levels of natural sugars compared to other fruits like mangoes or bananas.

No, dried fruits are not low in calories. The drying process removes the water, concentrating the natural sugars and calories. A small portion of dried fruit can contain many more calories than a much larger portion of the fresh version.

Yes, incorporating low-calorie, high-fiber, and high-water fruits into your diet can support weight loss. They provide essential nutrients and help you feel full, which can prevent overeating and reduce overall calorie intake.

A botanical fruit is the mature ovary of a flowering plant that encloses the seed, which is why cucumbers and tomatoes are classified as fruits. A culinary fruit is a plant that is sweet and used in dishes like desserts, which is why rhubarb is a 'culinary fruit' despite being a vegetable botanically.

You can add low-calorie fruits to your diet by snacking on fresh berries, adding sliced fruit to breakfast cereal or oatmeal, blending them into smoothies, or mixing them into salads for extra flavor and nutrients.

Medical Disclaimer

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