将茶匙换算成毫升

Teaspoon (U.S.)

定义
A U.S. customary teaspoon (tsp) is a volume measure equal to 4.9289215938 毫升. The “metric teaspoon” used in many nutrition labels and recipes is standardized at 5 毫升.

历史与起源
In the 18th-century Apothecaries’ system, the teaspoon equaled 1 液量, ¼ tablespoon或 ⅛ fluid ounce. Early teacups and spoons were small—reflecting the high cost of tea—so a teaspoon then was smaller than today’s. As tea became affordable in the early 1700s, spoons grew to ⅓ 汤匙, matching the current size ratio.

现代使用
Teaspoons measure small volumes in cooking (especially baking) and dispense medication. Outside kitchens and pharmacies, metric units like milliliters or liters prevail for volume.

毫升

定义
A milliliter (mL) is the metric volume unit equal to 1 立方厘米（1 立方厘米）, 0.001 liters或 1 × 10-⁶ m³.

历史与起源
The milliliter derives from the liter (originally 公升 in French), once defined by water’s mass. Today it simply reflects the “milli-” prefix—one-thousandth of a cubic decimeter.

现代使用
Milliliters are ubiquitous for small-volume needs: lab solutions, medicine syringes, condiment bottles, travel toiletries, and nutritional labeling. Precision instruments (pipettes, graduated cylinders) rely on mL graduations.

Teaspoon → Milliliter Conversion Table

如何转换

• 1 茶匙 US = 4.9289215938 毫升

• 1 mL ≈ 0.2028841362 tsp US

示例

转换 15 tsp US to milliliters:

15 tsp × 4.9289215938 mL/tsp = 73.9338239063 mL