Oh, Chai tea was answering, too.
My Better Homes & Gardens cookbook has a "weights and measures" chart on the inside cover, and it says that 1/4 pound = 125 grams. <shrug> Not sure if it's right or not, but it has that direct equation.
Lord Ellpus, we buy butter by the pound, usually -- it's a rectangular container with four quarter-pound, individually wrapped narrow rectangular "bricks" of butter. Many recipes call for "sticks" of butter (1/2 cup increments).