Teaspoon (US) to Fluid Ounce (UK) Converter

Volume Converter

40 units available

Decimals:

From

To

0.173474

1 tsp = 0.173474 fl oz (UK)

Formula:

fl oz (UK) = tsp × 0.1734737885

With your value: 1 tsp = 0.17347379 fl oz (UK)

How big is that?

Everyday references on a logarithmic scale, all expressed in teaspoon (us) so you can sanity-check the result.

Soda can (1/15 your value)0.0670 tsp

Milk carton (1/4.9 your value)0.203 tsp

Your value1.00 tsp

Kitchen bucket (2.0× your value)2.03 tsp

Car fuel tank (10× your value)10.1 tsp

Bathtub (41× your value)40.6 tsp

Other Teaspoon (US) to Fluid Ounce (UK) conversions

2 tsp to fl oz (UK)3 tsp to fl oz (UK)4 tsp to fl oz (UK)5 tsp to fl oz (UK)6 tsp to fl oz (UK)7 tsp to fl oz (UK)8 tsp to fl oz (UK)

Teaspoon (US) to Fluid Ounce (UK) Conversion Table

Teaspoon (US) (tsp)	Fluid Ounce (UK) (fl oz (UK))
0.5	0.086737
1	0.173474
2	0.346948
5	0.867369
10	1.734738
15	2.602107
20	3.469476
25	4.336845
50	8.673689
100	17.347379
250	43.368447
500	86.736894
1000	173.473788

Fluid Ounce (UK) to Teaspoon (US) Conversion Table

Fluid Ounce (UK) (fl oz (UK))	Teaspoon (US) (tsp)
0.5	2.88228
1	5.76456
2	11.529119
5	28.822798
10	57.645596
15	86.468395
20	115.291193
25	144.113991
50	288.227982
100	576.455964
250	1,441.139911
500	2,882.279821
1000	5,764.559642

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Teaspoon (US) (tsp)

Volume

Exact conversion

Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Fluid Ounce (UK) (fl oz (UK))

Volume

Exact conversion

Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Teaspoon (US) to Fluid Ounce (UK)

To convert from Teaspoon (US) (tsp) to Fluid Ounce (UK) (fl oz (UK)), multiply the value by 0.1734737885.

Formula: fl oz (UK) = tsp × 0.1734737885

Reverse: tsp = fl oz (UK) × 5.7645596424

Step-by-Step Example

Start with your value in Teaspoon (US). For example: 5 tsp
Multiply by the conversion factor: 5 x 0.1734737885
The result is: 0.867369 fl oz (UK)

About Teaspoon (US)

The US teaspoon equals approximately 4.93 mL. It is one of the most common cooking measurements.

Common uses: cooking, medicine dosage, baking.

About Fluid Ounce (UK)

The fluid ounce (uk) (fl oz (UK)) is a unit of volume and capacity. One fluid ounce (uk) equals 0.0284130625 litres. UnitConvertLab converts it against every other volume unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: volume calculations, engineering and science, education.

Frequently Asked Questions

How many Fluid Ounce (UK) are in 1 Teaspoon (US)?

There are exactly 0.1734737885 Fluid Ounce (UK) in 1 Teaspoon (US). This means the conversion factor from Teaspoon (US) to Fluid Ounce (UK) is 0.1734737885.

What is the formula to convert Teaspoon (US) to Fluid Ounce (UK)?

The formula to convert Teaspoon (US) to Fluid Ounce (UK) is: fl oz (UK) = tsp × 0.1734737885. For example, to convert 10 Teaspoon (US) to Fluid Ounce (UK), you would multiply 10 by 0.1734737885.

What is a Teaspoon (US)?