How many pounds is a barrel of flour?

In US dry measure a barrel is 105 quarts(struck)

That is equal to 7056.066 cu. in.

1 lb. of flour is approximately 50 cu.in.(slightly more)

1 bbl of flour therefore is approximately 141 lbs.

**struck means level, as opposed to heaped, a heaped bushel = 1.25 struck bushels or 5 peck (struck)