Convert cups (us customary) to cups (metric) for cooking measurements.
Definition: A US customary cup is a volume unit equal to about 236.588 milliliters.
History/origin: The cup was standardized in the United States as cookbooks and measuring sets replaced rough household approximations.
Current use: US cups are central to American recipes for liquids, flour, sugar, and many household ingredients.
Definition: The metric cup is a round metric kitchen measure. It holds exactly 250 mL, making four metric cups equal to one liter.
History/origin: Some metric countries kept cup-style cooking while replacing older variable cup sizes with a simple 250 mL standard.
Current use: Metric cups appear in Australian and New Zealand recipes, some Canadian cookbooks, measuring jugs, meal-prep guides, and recipes adapted for metric kitchens.
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