400 grams of rolled oats to cups
400 grams of rolled oats is 5 cups — near enough 4 3/4 cups + 4 tbsp.
The answer
5 cups
≈ 4 3/4 cups + 4 tbsp
Worked out from 80 grams per US cup: 400 ÷ 80 = 5. Approximate — density shifts with packing and brand.
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Based on g per cup. Approximate — density varies with packing and brand.