Convert teaspoons to fluid ounces

1 tsp=0.1667fl oz

Use the converter below to change any teaspoons value into fluid ounces instantly — with formula, conversion table, and real-world examples.

You have

Equals

0.16667

Conversion formula

Forward

fluid ounces = teaspoons × 0.1667

Reverse

teaspoons = fluid ounces × 6

Example: 10 tsp × 0.1667 = 1.66667 fl oz.

About both units

From

Teaspoon

tsp

The teaspoon equals 4.929 ml in the US, rounded to 5 ml in most recipes and on medication labels. The relationship 3 teaspoons = 1 tablespoon is universal across US, UK and metric systems. Precision medicine and small-volume cooking rely on teaspoons.

Real-world: 1 teaspoon of sugar = 4 g = 16 calories. Salt in a recipe often ½ to 1 tsp per 500 g food.

Read full teaspoon reference →

Fluid Ounce

fl oz

The US fluid ounce equals 29.5735 millilitres — 1/128 of a US gallon. The UK fluid ounce (28.41 ml) is slightly smaller. Used for beverage can sizes in the US, cosmetic product sizes and many US cooking recipes. Do not confuse with the ounce of mass (28.35 g).

Real-world: A US soda can is 12 fl oz (355 ml). A Starbucks Tall is 12 fl oz; Grande is 16; Venti is 20.

Read full fluid ounce reference →

Teaspoon to Fluid Ounce conversion table

Common teaspoons to fluid ounces values for quick reference.

Teaspoon (tsp)	Fluid Ounce (fl oz)
1 tsp	0.1667 fl oz
2 tsp	0.3333 fl oz
5 tsp	0.8333 fl oz
10 tsp	1.66667 fl oz
20 tsp	3.33333 fl oz
50 tsp	8.33333 fl oz
100 tsp	16.6667 fl oz
200 tsp	33.3333 fl oz
500 tsp	83.3333 fl oz
1,000 tsp	166.667 fl oz

Tips & common mistakes

Quick tips

1 tsp = 5 ml (practical); 4.929 ml (US legal).
3 tsp = 1 tbsp universally.
Use a proper measuring spoon — household teaspoons vary 3–8 ml.

Avoid these

Using a regular cutlery teaspoon for medication — can over- or under-dose by 30–60%.
Mixing tsp and tbsp — 3× difference.
Assuming "a pinch" or "a dash" is reproducible — it varies 0.1 to 0.5 ml.

Frequently asked questions

How many fluid ounces in a teaspoon?

One teaspoon equals 0.1667 fluid ounces.

How do I convert teaspoons to fluid ounces?

Multiply the teaspoon value by 0.1667 to get the equivalent in fluid ounces.

What is 100 teaspoons in fluid ounces?

100 teaspoons equals 16.6667 fluid ounces.

Is a teaspoon bigger than a fluid ounce?

No. 1 teaspoon equals 0.1667 fluid ounces, so one teaspoon is smaller.

How to convert teaspoons to fluid ounces without a calculator?

Multiply by 0.17 for a quick estimate; use a calculator for precise results.

Related volume conversions

📊 See full comparison matrix →

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