How many fluid ounces is 1 teaspoon?

1 US teaspoon equals exactly 1/6 of a US fluid ounce, which is approximately 0.1667 fl oz or 4.929 mL. The ratio is fixed by the US customary measurement definition.

How many teaspoons are in 1 fluid ounce?

There are exactly 6 US teaspoons in 1 US fluid ounce. To convert fluid ounces to teaspoons, multiply by 6.

Is a teaspoon a volume or weight measurement?

A teaspoon is a volume measurement — it measures how much space something takes up, not how heavy it is. For most liquid ingredients, this tool gives the right conversion. For dry ingredients, a teaspoon is still a volume measure, but the weight will vary by ingredient density.

Does this use US or metric teaspoons?

This converter uses the US customary teaspoon (about 4.929 mL). A metric teaspoon is exactly 5 mL, which is very close but not identical. US recipes use the US teaspoon.

How many teaspoons is 2 fluid ounces?

2 fluid ounces = 12 teaspoons (since 1 fl oz = 6 tsp, so 2 × 6 = 12 tsp).

Teaspoons to Ounces Converter

Enter teaspoons and instantly get fluid ounces — with quick presets for common recipe amounts and a reference table.

Enter Teaspoons

Teaspoons (US)

Common recipe amounts

US measurement relationship

1 tsp = 1/6 fl oz ≈ 0.1667 fl oz
3 tsp = 1 tablespoon = ½ fl oz
6 tsp = 1 fl oz
48 tsp = 1 cup (8 fl oz)

Result

Enter teaspoons on the left to see fluid ounces.

US Fluid Ounces 1 tsp = 1/6 fl oz

— fl oz

Recipe reference

Teaspoons	Fluid oz	mL

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Summary

This converter handles a common small-measure recipe conversion: teaspoons to fluid ounces. One US teaspoon equals exactly 1/6 of a US fluid ounce — about 0.1667 fl oz or 4.929 mL. The conversion is exact by US customary definition. This tool is useful when scaling recipes, following nutrition labels, or measuring liquid medication doses that mix teaspoon and fluid-ounce scales.

How it works

Enter the number of teaspoons in the input field.
The converter applies the exact US definition: 1 tsp = 1/6 fl oz.
The result updates instantly as you type.
Use the quick-select buttons for common recipe amounts (¼ tsp through 12 tsp).
The reference table below shows frequently used teaspoon amounts in fluid ounces.

Use cases

Scale a recipe that mixes teaspoon and fluid-ounce measurements.
Convert liquid extracts (vanilla, almond) from teaspoons to ounces for batch cooking.
Check a nutrition label serving size listed in fl oz against a teaspoon measure.
Measure liquid medication or supplements when a dosing cup shows fl oz.
Convert small amounts of oil, vinegar, or soy sauce from tsp to fl oz.
Teach kitchen math when explaining US measurement unit relationships.

Frequently Asked Questions

Last updated: 2026-07-14 · Reviewed by Nham Vu