Bread-Bakers v097.n057.10

Hello to all!  I've got a question about pan sizes for quick breads.
Approximately how many cups of flour does a loaf of bread that fits in a
9x5x3-inch pan take, as opposed to a loaf that fits into an 8 1/2 x4 1/2
x3-inch pan?  Thanks to anyone who can set me straight on this.
K. A. Langston