How many grams is in a cup measurment?

In American recipes "cups" are frequently used as a measure for both liquids and dry goods - much to the confusion of UK would-be cooks. As a measure of volume for liquids, a cup = 8 fluid ounces = a half-pint = 237 mililitres.

As a measure of weight for dry goods, a cup = 8 ounces = a half-pound = 225 grammes.