Calories in
rhubarb, raw
21 kcal per 100 g Rhubarb, raw contains 21 calories per 100 grams, or about 26 calories per cup, diced. Per 100 g it provides 0.9 g protein, 4.5 g carbohydrate and 0.2 g fat.
By calories that splits 77% carbohydrate, 15% protein, 8% fat.
Calories in a typical serving
Per-100 g figures are useful for comparison but nobody eats 100 g of anything on purpose. These are the USDA's own household measures.
| Serving | Grams | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|---|
| 1 cup, diced | 122.0 g | 26 | 1.1 g | 5.5 g | 0.2 g |
| 1 stalk | 51.0 g | 11 | 0.5 g | 2.3 g | 0.1 g |
Full nutrition, per 100 g and per cup, diced
| Nutrient | Per 100 g | Per cup, diced |
|---|---|---|
| Energy | 21 kcal | 26 kcal |
| Protein | 0.9 g | 1.1 g |
| Total fat | 0.2 g | 0.2 g |
| Saturated fat | 0.1 g | 0.1 g |
| Carbohydrate | 4.5 g | 5.5 g |
| Fibre | 1.8 g | 2.2 g |
| Sugars | 1.1 g | 1.3 g |
| Sodium | 4.0 mg | 4.9 mg |
| Potassium | 288.0 mg | 351.4 mg |
| Calcium | 86.0 mg | 104.9 mg |
| Iron | 0.2 mg | 0.3 mg |
| Vitamin C | 8.0 mg | 9.8 mg |
| Vitamin A | 5.0 µg | 6.1 µg |
| Cholesterol | 0.0 mg | 0.0 mg |
| Water | 93.6 g | 114.2 g |
USDA FoodData Central, SR Legacy (FDC ID 167758). A dash means the nutrient was not measured for this item, which is not the same as zero.
How rhubarb, raw compares
Among the 92 fruits and fruit juices items on this site, rhubarb, raw ranks 92 of 92 by calorie density, against a category average of 74 kcal per 100 g — so it is about 72% less calorie-dense than typical for its group.
It carries 4.3 g of protein per 100 calories, so it is not a meaningful protein source.
To burn off one cup, diced (26 kcal), a 70 kg adult would walk for roughly 5 minutes — see the walking calculation on our sister site, or pick a different activity. Treat that as a sense of scale rather than a rule: eating and moving are not a simple ledger.
Questions
How many calories are in rhubarb, raw?
Rhubarb, raw contains 21 calories per 100 g, which works out to about 26 calories per cup, diced. It also provides 0.9 g of protein, 4.5 g of carbohydrate and 0.2 g of fat per 100 g.
What is the macro breakdown of rhubarb, raw?
By calories, rhubarb, raw is roughly 77% carbohydrate, 15% protein and 8% fat. That makes it a predominantly carbohydrate-based food.
How long does it take to burn off a cup, diced?
About 5 minutes of ordinary walking for a 70 kg adult (MET 4.0). That is a rough guide for scale, not a prescription — appetite and activity interact in ways a simple subtraction does not capture.
Is this figure exact for the rhubarb, raw I bought?
No. These are USDA reference values, averaged across samples. Real foods vary with variety, ripeness, growing conditions, cut, brand and how they were cooked — 10–20% either way is normal. Use them for planning, not precision.
Similar foods
Closest in calorie density within fruits and fruit juices.
Source: USDA FoodData Central, SR Legacy — public domain. Full USDA description: "Rhubarb, raw". General information only — not medical or nutrition advice. Values are averages for a food type and vary by brand, ripeness and preparation.