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 4.8 g in a 1 cup, cooked serving of oatmeal, multigrain is 19% of the first and 13% of the second. US food labels use a single Daily Value of 28 g instead, which puts this serving at 17%.
Calorie for calorie, the figure is 3.6 g of fiber per 100 kcal (this serving is 134 kcal). Among the 200 prepared meals with USDA energy data here that is 25th, and 263rd 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 oatmeal, multigrain alone would take 6 servings, and 38 g would take 8. Most days reach the target through several different sources.
Dietary fiber and energy in Oatmeal, Multigrain for 100 g and the USDA household portions
Portion
Grams
Fiber
kcal
100 g
100
2 g
56
1 cup, cooked - this page's serving
240
4.8 g
134
1 cup, dry, yields
485
9.7 g
272
1 oz, dry, yields
170
3.4 g
95
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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