Convert teaspoons (us) to cups (metric) for cooking measurements.
Definition: A US teaspoon is a volume unit equal to about 4.9289 milliliters.
History/origin: The teaspoon started as a household spoon measure and was standardized as cooking became more precise.
Current use: Teaspoons are used for spices, vanilla, salt, baking powder, and small liquid or dry amounts.
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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