Fluid ounces (US) to Teaspoons (US) Converter

Convert fluid ounces (us) to teaspoons (us) for cooking measurements.

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Common cooking measurement units

US fluid ounce (fl oz)

Definition: A US fluid ounce is a volume unit equal to about 29.5735 milliliters.

History/origin: The fluid ounce comes from older English liquid measures and remained in the US customary cooking system.

Current use: Fluid ounces are used on beverage labels, liquid ingredient packaging, and some US recipes.

US teaspoon (tsp)

Definition: The US teaspoon is a small recipe volume measure. In the US customary system, 1 tsp is approximately 4.93 mL.

History/origin: What began as a practical spoonful became a fixed cookbook measure so cooks could repeat small additions without relying on spoon shape.

Current use: Tsp is used for leaveners, extracts, seasonings, yeast, citrus juice, hot sauce, medicine-style kitchen doses, and other compact recipe additions.

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