Convert Teaspoons to Fluid Ounces

The Conversion Formula

To convert teaspoons to fluid ounces, multiply the value by the conversion factor: 1 tsp = 0.166667 fl oz. For a worked example, suppose you need to convert 25 tsp to fluid ounces: 25 × 0.166667 = 4.1667 fl oz. To convert in the opposite direction, divide by 0.166667, or equivalently multiply by 6.

About teaspoons

The teaspoon (tsp) began as a spoon for stirring tea but became a critical unit of measure for potent ingredients like salt, baking powder, and spices. In the US, it is 1/6th of a fluid ounce (approx. 4.9 mL). The metric teaspoon is exactly 5 mL. This similarity means US and metric teaspoons are often interchangeable for home cooking without issues. teaspoons are commonly used in Spices and seasonings, Baking powder/soda, Vanilla extract, and Medicine (5 mL typically), Sugar in coffee.

A capful of vanilla extract is about 1 teaspoon.

About fluid ounces

The fluid ounce (fl oz) is a volume unit, not to be confused with the ounce (oz) of weight. In the US system, 8 fluid ounces make a cup, and 16 fluid ounces make a pint. It is the standard unit for beverage labeling in the US. Interestingly, a US fluid ounce of water weighs slightly more than one ounce by weight (approx. 1.04 oz), whereas in the Imperial system, 1 fl oz of water weighs exactly 1 oz. fluid ounces are commonly used in Soda cans (12 fl oz), Perfume bottles, Shampoo and lotion, and Bar measurements (shots), Medicine liquids.

A standard soda can contains 12 fluid ounces.

When Would You Convert teaspoons to fluid ounces?

Converting between teaspoons and fluid ounces is one of the most common volume conversions. You might need this conversion when working with international specifications, following instructions written for a different measurement system, or comparing values across different standards. Having the conversion factor (1 tsp = 0.166667 fl oz) memorized or bookmarked can save time in professional and everyday contexts alike.