US Teaspoons to UK Gallons (tsp to imp gal) Converter
1 US teaspoon (tsp) = 0.00108421 UK gallons (imp gal). To convert US teaspoons to UK gallons, multiply by 0.00108421: 1 tsp × 0.00108421 = 0.00108421 imp gal.
Quick facts
- 1 tsp = 0.00108421 imp gal
- 1 imp gal = 922.33 tsp
- Formula: imp gal = tsp × 0.00108421
- Quick estimate: multiply by about 0.0011
How to convert US teaspoons to UK gallons
- Start with your measurement in US teaspoons.
- Multiply it by 0.00108421 (the number of UK gallons in one US teaspoon).
- Check the answer: it should be smaller than the number you started with.
Worked example (a recipe): 1 tsp × 0.00108421 = 0.00108421 imp gal.
To convert UK gallons back to US teaspoons, multiply by 922.33, or divide by 0.00108421.
Source: NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units).
US Teaspoons to UK Gallons conversion table
| US Teaspoons [tsp] | UK Gallons [imp gal] |
|---|---|
| 0.01 tsp | 0.0000108421 imp gal |
| 0.1 tsp | 0.0001084211 imp gal |
| 1 tsp | 0.0010842112 imp gal |
| 2 tsp | 0.0021684224 imp gal |
| 3 tsp | 0.0032526335 imp gal |
| 5 tsp | 0.0054210559 imp gal |
| 10 tsp | 0.0108421118 imp gal |
| 20 tsp | 0.0216842236 imp gal |
| 50 tsp | 0.054210559 imp gal |
| 100 tsp | 0.1084211179 imp gal |
| 1000 tsp | 1.0842111793 imp gal |
tsp to imp gal chart from 1 to 100
- 1 tsp 0.00108421 imp gal
- 2 tsp 0.00216842 imp gal
- 3 tsp 0.00325263 imp gal
- 4 tsp 0.00433684 imp gal
- 5 tsp 0.00542106 imp gal
- 6 tsp 0.00650527 imp gal
- 7 tsp 0.00758948 imp gal
- 8 tsp 0.00867369 imp gal
- 9 tsp 0.0097579 imp gal
- 10 tsp 0.0108421 imp gal
- 11 tsp 0.0119263 imp gal
- 12 tsp 0.0130105 imp gal
- 13 tsp 0.0140947 imp gal
- 14 tsp 0.015179 imp gal
- 15 tsp 0.0162632 imp gal
- 16 tsp 0.0173474 imp gal
- 17 tsp 0.0184316 imp gal
- 18 tsp 0.0195158 imp gal
- 19 tsp 0.0206 imp gal
- 20 tsp 0.0216842 imp gal
- 25 tsp 0.0271053 imp gal
- 30 tsp 0.0325263 imp gal
- 35 tsp 0.0379474 imp gal
- 40 tsp 0.0433684 imp gal
- 45 tsp 0.0487895 imp gal
- 50 tsp 0.0542106 imp gal
- 55 tsp 0.0596316 imp gal
- 60 tsp 0.0650527 imp gal
- 65 tsp 0.0704737 imp gal
- 70 tsp 0.0758948 imp gal
- 75 tsp 0.0813158 imp gal
- 80 tsp 0.0867369 imp gal
- 85 tsp 0.092158 imp gal
- 90 tsp 0.097579 imp gal
- 95 tsp 0.103 imp gal
- 100 tsp 0.108421 imp gal
UK Gallons to US Teaspoons conversion table
| UK Gallons [imp gal] | US Teaspoons [tsp] |
|---|---|
| 0.01 imp gal | 9.2232954162 tsp |
| 0.1 imp gal | 92.2329541618 tsp |
| 1 imp gal | 922.3295416182 tsp |
| 2 imp gal | 1844.6590832364 tsp |
| 3 imp gal | 2766.9886248546 tsp |
| 5 imp gal | 4611.647708091 tsp |
| 10 imp gal | 9223.2954161819 tsp |
| 20 imp gal | 18446.5908323638 tsp |
| 50 imp gal | 46116.4770809095 tsp |
| 100 imp gal | 92232.9541618191 tsp |
| 1000 imp gal | 922329.5416181908 tsp |
US Teaspoons vs UK Gallons
| US Teaspoon | UK Gallon | |
|---|---|---|
| Symbol | tsp | imp gal |
| Equals | 1 tsp = 0.00108421 imp gal | 1 imp gal = 922.33 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 gallon?
The imperial gallon, defined as exactly 4.54609 litres (UK Weights and Measures Act 1985); about 20% larger than the US gallon. Used in the UK and Canada for fuel economy (miles per gallon), garden and aquarium volumes, and older fuel prices.
Where You Will Meet US Teaspoons and UK Gallons
US teaspoons are used mainly in the United States, while UK gallons are used mainly in the UK (pub pints, fuel economy in mpg) and older Canadian recipes. This conversion bridges the US customary and metric systems, so it comes up whenever a figure crosses the US border with Canada or the Atlantic with the UK: product specifications, travel, recipes, school work and trade.
How big is 1 tsp compared with 1 imp gal?
1 tsp is only 0.00108421 of 1 imp gal: you need 922.33 US teaspoons to make 1 imp gal, so the number gets smaller when you convert.
US Teaspoons to UK Gallons without a calculator
- In your head: multiply by 0.001 (about 7.8% off). 0.5 tsp × 0.001 ≈ 0.0005 imp gal.
- Closer estimate: multiply by 0.0011 (within 1.5%).
- Or divide: divide by 920 (within 0.25%), which is often easier than multiplying by a small decimal.
Real-world tsp to imp gal examples
| Example | US Teaspoons | UK Gallons |
|---|---|---|
| A teaspoon of baking powder | 1 tsp | 0.00108421 imp gal |
| Half a teaspoon of salt | 0.5 tsp | 0.000542106 imp gal |
| Two teaspoons of sugar | 2 tsp | 0.00216842 imp gal |
| One imperial gallon | 922.33 tsp | 1 imp gal |
| A small aquarium | 9223.3 tsp | 10 imp gal |
| A garden water butt | 41504.8 tsp | 45 imp gal |
How exact is the tsp to imp gal factor?
The factor is exact by definition, so any error comes only from rounding. For everyday use, 3 significant figures are plenty; for engineering or invoices, keep 5 or more.
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 gallons
A US teaspoon is about 4.93 ml, usually rounded to 5 ml on medicine spoons.
The imperial gallon was introduced in 1824 and is defined as exactly 4.54609 litres.
Keep converting
Next, you might want us teaspoons to us gallons, uk gallons to liters, uk gallons to us gallons and us teaspoons to milliliters. The full volume converter lists every unit.
On pakmath.com, the scientific calculator is a useful next step; our sister site Adzita has a gas mileage calculator.
Frequently asked questions
How many UK gallons are in a US teaspoon?
There are 0.00108421 UK gallons in 1 US teaspoon (1 tsp = 0.0010842112 imp gal).
How many US teaspoons are in a UK gallon?
There are 922.33 US teaspoons in 1 UK gallon (1 imp gal = 922.3295416182 tsp).
How do I convert US teaspoons to UK gallons?
Multiply the number of US teaspoons by 0.00108421. For example, 10 tsp × 0.00108421 = 0.0108421 imp gal. To convert back, multiply by 922.33.
What is 10 tsp in UK gallons?
10 tsp = 0.0108421 imp gal.
What is 100 tsp in UK gallons?
100 tsp = 0.108421 imp gal.
How accurate is this US teaspoon to UK gallon converter?
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 gallons?
In your head: multiply by 0.001 (about 7.8% off). 0.5 tsp × 0.001 ≈ 0.0005 imp gal.
How many UK gallons is 1 tsp (a teaspoon of baking powder)?
1 tsp = 0.00108421 imp gal.
How many US teaspoons is a garden water butt (45 imp gal)?
45 imp gal = 41504.8 tsp.
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