Short answerThe lowest calorie fruits are watermelon and pink grapefruit at 30 calories per 100 g, strawberries at 32 and cantaloupe at 34. Per cup, watermelon (46), cranberries (46) and strawberries (49) are lowest. Bananas are the highest of common fruits at 89 calories per 100 g. No fruit has zero calories.
What is the lowest calorie fruit? 15 fruits ranked
Here's every fruit on this page from the fewest calories per 100 g to the most, with a typical cup for each, from USDA FoodData Central:
| Fruit | Per 100 g | Per cup | Fiber per cup | Vitamin C per cup |
|---|---|---|---|---|
| Tomato* | 18 | 32 (chopped) | 2.2 g | 25 mg |
| Lemon* | 29 | 61 (sections) | 5.9 g | 112 mg |
| Watermelon | 30 | 46 (diced) | 0.6 g | 12 mg |
| Pink grapefruit | 30 | 69 (sections) | 2.5 g | 85 mg |
| Strawberries | 32 | 49 (halves) | 3.0 g | 89 mg |
| Cantaloupe | 34 | 54 (cubes) | 1.4 g | 59 mg |
| Honeydew | 36 | 61 (diced) | 1.4 g | 31 mg |
| Peaches | 39 | 60 (slices) | 2.3 g | 10 mg |
| Blackberries | 43 | 62 | 7.6 g | 30 mg |
| Papaya | 43 | 62 (pieces) | 2.5 g | 88 mg |
| Cranberries | 46 | 46 (whole) | 3.6 g | 14 mg |
| Raspberries | 52 | 64 | 8.0 g | 32 mg |
| Blueberries | 57 | 84 | 3.6 g | 14 mg |
| Grapes | 69 | 104 | 1.4 g | 5 mg |
| Banana | 89 | 134 (sliced) | 3.9 g | 13 mg |
* Tomatoes and lemons are fruits botanically, but most people don't eat them as a sweet snack. Among sweet fruits, watermelon and grapefruit are the lightest fruit per gram. For comparison, navel oranges have 49 calories per 100 g and mandarins 53.
Lowest calorie fruit per 100 g vs per cup
The lowest calorie fruit per 100g isn't always the lowest per cup, because a cup of light, airy fruit weighs less than a cup of dense fruit. Cranberries have 46 calories per 100 g, but a cup weighs only 100 g, so it ties with watermelon at 46 calories a cup. Grapefruit sections are heavy, so a cup of grapefruit has more calories than a cup of strawberries.
Why these fruits are so low in calories
Low cal fruit like watermelon, strawberries and melons has only a little natural sugar per gram and almost no fat. Fruit with the least calories also tends to have less sugar per bite: watermelon has 6.2 g of sugar per 100 g against 15.5 g in grapes. Bananas and grapes are at the top of the list because they have more sugar and starch. For fiber and vitamins per calorie across fruit, vegetables and protein foods, see nutritional value explained. Whole fruit fits a no added sugar diet too.
Are there fruits with no calories?
No. Every fruit has some calories from its sugars, so fruits with no calories don't exist. But at 30 calories per 100 g, the lowest ones come close: a full cup of diced watermelon has 46.
Most filling low calorie fruits
If you want fruit that fills you up, look at fiber as well as calories. Raspberries (8.0 g per cup) and blackberries (7.6 g) have the most fiber of any fruit here, with only 62 to 64 calories a cup. They also have the fewest net carbs per cup, about 6 to 7 g. The fiber calculator shows how berries help you reach your daily target.
Watermelon calories
Watermelon has 30 calories per 100 g. A cup of diced watermelon has 46, a wedge that's 1/16 of a large melon (286 g) has 86, and 10 oz of watermelon has about 85 calories. Watermelon also gives 28 mcg of vitamin A per 100 g.
Calories in a bowl of fruit
How many calories in a bowl of fruit depends on what's in it and how big the bowl is. A 3-cup bowl with 1 cup each of watermelon, strawberries and blueberries has about 179 calories. Calories in 1 cup of mixed fruit from the lowest calorie fruits on this list come to 46 to 69; add grapes or banana and a cup can pass 100. Set the amount of each fruit in the calculator above to build your bowl.
Tomato calories
Tomatoes are the lowest calorie fruit of all here, at 18 calories per 100 g. 1/2 tomato (about 62 g) has 11 calories, 1/2 cup of chopped tomatoes 16, and a whole medium tomato 22.
Fitting fruit into your day
In the UK, an adult portion of fruit is 80 g; see our Eatwell Guide explainer for 5 A Day portions. For a crunchy snack that isn't fruit, 3 oz of baby carrots has 30 calories. The Dietary Guidelines for Americans, 2025–2030, set a goal of 2 servings of fruit a day on a 2,000-calorie pattern, eaten whole where possible. Two cups of the lowest calorie fruits come to around 100 calories. Add fruit to your log in the calorie counter, and check your total target with the TDEE calculator.
Low calorie fruit FAQ
What is the lowest calorie fruit?
Among common sweet fruits, watermelon and pink grapefruit are lowest at 30 calories per 100 g, followed by strawberries at 32 and cantaloupe at 34. Tomatoes, botanically a fruit, have only 18, and lemons 29.
Which fruits have the fewest calories per cup?
A cup of diced watermelon has 46 calories, a cup of whole cranberries 46 and a cup of strawberry halves 49. A cup of cantaloupe has 54, against 104 for grapes and 134 for sliced banana.
Are there fruits with no calories?
No. Every fruit has some calories from its natural sugars. The lowest, like watermelon and strawberries, have around 30 calories per 100 g, which makes them close to free foods for most people.
How many calories are in a bowl of fruit?
It depends on the fruit and the bowl. A 3-cup bowl with 1 cup each of watermelon, strawberries and blueberries has about 179 calories. Grapes and bananas raise it faster.
How many calories are in a watermelon wedge?
About 86 calories in a wedge that's 1/16 of a large melon (286 g). Watermelon has 30 calories per 100 g, so 10 oz has about 85.
Sources
- U.S. Department of Agriculture, FoodData Central (SR Legacy), raw: watermelon (167765); grapefruit, pink and red (174675); strawberries (167762); cantaloupe (169092); honeydew (169911); peaches (169928); blackberries (173946); papayas (169926); cranberries (171722); raspberries (167755); blueberries (171711); grapes (174683); bananas (173944); tomatoes (170457); lemons, without peel (167746).
- U.S. Departments of Health and Human Services and Agriculture. Dietary Guidelines for Americans, 2025–2030, January 2026 (fruit servings).