400 grams of cake flour to cups
400 grams of cake flour is 3.51 cups — near enough 3 1/2 cups.
The answer
3.51 cups
≈ 3 1/2 cups
Worked out from 114 grams per US cup: 400 ÷ 114 = 3.51. Approximate — density shifts with packing and brand.
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≈
Based on g per cup. Approximate — density varies with packing and brand.
How you measure it changes this
The figure above assumes spooned & levelled. Cake Flour has 2 measured techniques on record, and they differ enough to matter — see the full cake flour page for the comparison.