US Teaspoons to UK Fluid Ounces (tsp to imp fl oz) Converter
1 US teaspoon (tsp) = 0.173474 UK fluid ounces (imp fl oz). To convert US teaspoons to UK fluid ounces, multiply by 0.173474: 1 tsp × 0.173474 = 0.173474 imp fl oz.
Quick facts
- 1 tsp = 0.173474 imp fl oz
- 1 imp fl oz = 5.76456 tsp
- Formula: imp fl oz = tsp × 0.173474
- Quick estimate: multiply by about 0.17
How to convert US teaspoons to UK fluid ounces
- Write down the number of US teaspoons you have.
- Multiply it by 0.173474 (the number of UK fluid ounces in one US teaspoon).
- Round the result to the precision you need.
Worked example (a recipe): 1 tsp × 0.173474 = 0.173474 imp fl oz.
To convert UK fluid ounces back to US teaspoons, multiply by 5.76456, or divide by 0.173474.
Source: NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units).
US Teaspoons to UK Fluid Ounces conversion table
| US Teaspoons [tsp] | UK Fluid Ounces [imp fl oz] |
|---|---|
| 0.01 tsp | 0.0017347379 imp fl oz |
| 0.1 tsp | 0.0173473789 imp fl oz |
| 1 tsp | 0.1734737887 imp fl oz |
| 2 tsp | 0.3469475774 imp fl oz |
| 3 tsp | 0.5204213661 imp fl oz |
| 5 tsp | 0.8673689434 imp fl oz |
| 10 tsp | 1.7347378868 imp fl oz |
| 20 tsp | 3.4694757737 imp fl oz |
| 50 tsp | 8.6736894342 imp fl oz |
| 100 tsp | 17.3473788684 imp fl oz |
| 1000 tsp | 173.4737886843 imp fl oz |
tsp to imp fl oz chart from 1 to 100
- 1 tsp 0.173474 imp fl oz
- 2 tsp 0.346948 imp fl oz
- 3 tsp 0.520421 imp fl oz
- 4 tsp 0.693895 imp fl oz
- 5 tsp 0.867369 imp fl oz
- 6 tsp 1.04084 imp fl oz
- 7 tsp 1.21432 imp fl oz
- 8 tsp 1.38779 imp fl oz
- 9 tsp 1.56126 imp fl oz
- 10 tsp 1.73474 imp fl oz
- 11 tsp 1.90821 imp fl oz
- 12 tsp 2.08169 imp fl oz
- 13 tsp 2.25516 imp fl oz
- 14 tsp 2.42863 imp fl oz
- 15 tsp 2.60211 imp fl oz
- 16 tsp 2.77558 imp fl oz
- 17 tsp 2.94905 imp fl oz
- 18 tsp 3.12253 imp fl oz
- 19 tsp 3.296 imp fl oz
- 20 tsp 3.46948 imp fl oz
- 25 tsp 4.33684 imp fl oz
- 30 tsp 5.20421 imp fl oz
- 35 tsp 6.07158 imp fl oz
- 40 tsp 6.93895 imp fl oz
- 45 tsp 7.80632 imp fl oz
- 50 tsp 8.67369 imp fl oz
- 55 tsp 9.54106 imp fl oz
- 60 tsp 10.4084 imp fl oz
- 65 tsp 11.2758 imp fl oz
- 70 tsp 12.1432 imp fl oz
- 75 tsp 13.0105 imp fl oz
- 80 tsp 13.8779 imp fl oz
- 85 tsp 14.7453 imp fl oz
- 90 tsp 15.6126 imp fl oz
- 95 tsp 16.48 imp fl oz
- 100 tsp 17.3474 imp fl oz
UK Fluid Ounces to US Teaspoons conversion table
| UK Fluid Ounces [imp fl oz] | US Teaspoons [tsp] |
|---|---|
| 0.01 imp fl oz | 0.0576455964 tsp |
| 0.1 imp fl oz | 0.5764559635 tsp |
| 1 imp fl oz | 5.7645596351 tsp |
| 2 imp fl oz | 11.5291192702 tsp |
| 3 imp fl oz | 17.2936789053 tsp |
| 5 imp fl oz | 28.8227981756 tsp |
| 10 imp fl oz | 57.6455963511 tsp |
| 20 imp fl oz | 115.2911927023 tsp |
| 50 imp fl oz | 288.2279817557 tsp |
| 100 imp fl oz | 576.4559635114 tsp |
| 1000 imp fl oz | 5764.5596351137 tsp |
US Teaspoons vs UK Fluid Ounces
| US Teaspoon | UK Fluid Ounce | |
|---|---|---|
| Symbol | tsp | imp fl oz |
| Equals | 1 tsp = 0.173474 imp fl oz | 1 imp fl oz = 5.76456 tsp |
What is a US teaspoon?
A US customary cooking measure equal to 1/3 tablespoon. Used in US recipes for small quantities of ingredients.
What is a UK fluid ounce?
A UK imperial unit equal to 1/20 of an imperial pint (exactly 28.4130625 ml). Used in the UK and Canada on older recipes, drinks measures and some bottle labels.
When You Need to Convert US Teaspoons to UK Fluid Ounces
US teaspoons are used mainly in the United States, while UK fluid ounces are used mainly in the UK (pub pints, fuel economy in mpg) and older Canadian recipes. Because the two units come from different systems, Americans, Britons and Canadians often need it when buying from each other online, following each other's recipes or instructions, or filling in official forms.
How big is 1 tsp compared with 1 imp fl oz?
1 tsp is only 0.173474 of 1 imp fl oz: you need 5.76456 US teaspoons to make 1 imp fl oz, so the number gets smaller when you convert.
US Teaspoons to UK Fluid Ounces without a calculator
- Closer estimate: multiply by 0.17 (within 2%).
- Or divide: divide by 5.8 (within 0.61%), which is often easier than multiplying by a small decimal.
Real-world tsp to imp fl oz examples
| Example | US Teaspoons | UK Fluid Ounces |
|---|---|---|
| A teaspoon of baking powder | 1 tsp | 0.173474 imp fl oz |
| Half a teaspoon of salt | 0.5 tsp | 0.0867369 imp fl oz |
| Two teaspoons of sugar | 2 tsp | 0.346948 imp fl oz |
| One imperial pint | 115.291 tsp | 20 imp fl oz |
| Half a pint | 57.6456 tsp | 10 imp fl oz |
| One imperial fluid ounce | 5.76456 tsp | 1 imp fl oz |
How exact is the tsp to imp fl oz factor?
The factor is exact by definition, so any error comes only from rounding. Round the final answer, not the factor, and match the precision of the number you started with.
Mistakes to avoid
- US and imperial (UK) measures share names but not sizes. Check which one a recipe, label or fuel figure uses before converting.
Background on US teaspoons and UK fluid ounces
A US teaspoon is about 4.93 ml, usually rounded to 5 ml on medicine spoons.
Keep converting
People who convert us teaspoons to uk fluid ounces often need us teaspoons to us fluid ounces, uk fluid ounces to milliliters, uk fluid ounces to us fluid ounces and us teaspoons to milliliters. The full volume converter lists every unit.
On pakmath.com, the percentage calculator is a useful next step, as is the scientific calculator; for related everyday maths, try the calorie calculator on Adzita.
Frequently asked questions
How many UK fluid ounces are in a US teaspoon?
There are 0.173474 UK fluid ounces in 1 US teaspoon (1 tsp = 0.1734737887 imp fl oz).
How many US teaspoons are in a UK fluid ounce?
There are 5.76456 US teaspoons in 1 UK fluid ounce (1 imp fl oz = 5.7645596351 tsp).
How do I convert US teaspoons to UK fluid ounces?
Use imp fl oz = tsp × 0.173474. So 10 tsp becomes 1.73474 imp fl oz; for the reverse, multiply by 5.76456.
What is 10 tsp in UK fluid ounces?
10 tsp = 1.73474 imp fl oz.
What is 100 tsp in UK fluid ounces?
100 tsp = 17.3474 imp fl oz.
Is the conversion exact?
Yes. The factor comes from the official definitions of both units (NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units)). Results are shown to up to 10 decimal places; round them to suit your purpose.
What is an easy way to convert US teaspoons to UK fluid ounces?
Closer estimate: multiply by 0.17 (within 2%).
How many UK fluid ounces is 0.5 tsp (half a teaspoon of salt)?
0.5 tsp = 0.0867369 imp fl oz.
How many US teaspoons is one imperial pint (20 imp fl oz)?
20 imp fl oz = 115.291 tsp.
Related conversions
Popular volume conversions
- Liters to US Gallons
- US Gallons to Liters
- Milliliters to US Cups
- US Cups to Milliliters
- US Tablespoons to Milliliters
- US Teaspoons to Milliliters
- Milliliters to US Fluid Ounces
- US Fluid Ounces to Milliliters
- US Tablespoons to US Fluid Ounces
- Liters to UK Gallons
- UK Gallons to Liters
- UK Gallons to US Gallons
Convert US teaspoons to other units
- US Teaspoons to Milliliters
- US Teaspoons to Liters
- US Teaspoons to Cubic Meters
- US Teaspoons to US Tablespoons
- US Teaspoons to US Fluid Ounces
- US Teaspoons to US Cups
- US Teaspoons to US Pints
- US Teaspoons to US Quarts
- US Teaspoons to US Gallons
- US Teaspoons to UK Pints
- US Teaspoons to UK Quarts
- US Teaspoons to UK Gallons
- US Teaspoons to Cubic Feet
- US Teaspoons to Cubic Inches
Convert other units to UK fluid ounces
- Milliliters to UK Fluid Ounces
- Liters to UK Fluid Ounces
- Cubic Meters to UK Fluid Ounces
- US Tablespoons to UK Fluid Ounces
- US Fluid Ounces to UK Fluid Ounces
- US Cups to UK Fluid Ounces
- US Pints to UK Fluid Ounces
- US Quarts to UK Fluid Ounces
- US Gallons to UK Fluid Ounces
- UK Pints to UK Fluid Ounces
- UK Quarts to UK Fluid Ounces
- UK Gallons to UK Fluid Ounces
- Cubic Feet to UK Fluid Ounces
- Cubic Inches to UK Fluid Ounces
Open the full volume converter with every unit →