Calories in Rhubarb

26kcal per 1 cup, diced (122 g)

21 kcal per 100 g · about 1% of a 2,000-kcal day

Raw rhubarb is bracingly tart and just 26 calories a cup, which is why recipes pile on the sugar. On its own it is one of the lowest-calorie things in the produce aisle.

Rhubarb nutrition facts

NutrientPer 100 gPer 1 cup, diced
Calories21 kcal26 kcal
Protein0.9 g1.1 g
Carbs4.5 g5.5 g
Fat0.2 g0.2 g
Fiber1.8 g2.2 g
Sugar1.1 g1.3 g

Where the calories come from

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Values based on USDA FoodData Central reference entries. Actual nutrition varies with variety, preparation, and portion. © 2026 NibbleCal.