The Dietary Reference Intakes set an Adequate Intake for total fiber of 25 g a day for women aged 19 to 50 and 38 g for men of the same ages. Measured against those, the 4.1 g in a 1 cup cooked serving of brussels sprouts is 16% of the first and 11% of the second. US food labels use a single Daily Value of 28 g instead, which puts this serving at 15%.
Calorie for calorie, the figure is 7.2 g of fiber per 100 kcal (this serving is 56 kcal). Among the 178 vegetables with USDA energy data here that is 37th, and 57th across all 957. The intakes above were derived from 14 g of fiber per 1,000 kcal, or 1.4 g per 100 kcal, so this food sits above the ratio a whole day of eating is meant to reach.
Getting all 25 g from brussels sprouts alone would take 7 servings, and 38 g would take 10. Most days reach the target through several different sources.
Dietary fiber and energy in Brussels sprouts for 100 g and the USDA household portions
Portion
Grams
Fiber
kcal
100 g
100
2.6 g
36
1 cup cooked - this page's serving
156
4.1 g
56
1 sprout
21
0.5 g
8
0.5 cup
78
2 g
28
Gram weights come from the household measures on the USDA record; fiber and energy for each portion are its per-100 g values scaled to that weight.
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How many grams of fiber are in a 1 cup cooked serving of brussels sprouts?
4.1 g of total dietary fiber, in a portion weighing 156 g. On a US label that reads as 15% of the 28 g Daily Value.
What is the fiber rank of brussels sprouts in its food group?
By fiber per serving it is number 116 of 179 in its group in this database, and number 37 of 178 when ranked by fiber per 100 kcal.
How much fiber is there per 100 calories of brussels sprouts?
7.2 g. USDA lists 2.6 g of fiber and 36 kcal in 100 g, and dividing one by the other gives the figure, whatever the portion.
How many servings of brussels sprouts would cover a day's fiber on their own?
About 7 for the 25 g Adequate Intake for women aged 19 to 50, or 10 for the 38 g set for men of those ages.
Per-100 g figures and portion weights on this page come from USDA FoodData Central record 169971 (Brussels sprouts, cooked, boiled, drained, without salt, SR Legacy). USDA nutrient data is public domain.