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UK Gallons to US Teaspoons (imp gal to tsp) Converter

1 UK gallon (imp gal) = 922.33 US teaspoons (tsp). To convert UK gallons to US teaspoons, multiply by 922.33: 25 imp gal × 922.33 = 23,058.2 tsp.

1 imp gal = 922.3295416182 tsp
Convert the other way: US Teaspoons to UK Gallons

Quick facts

How to convert UK gallons to US teaspoons

  1. Take the value in UK gallons.
  2. Multiply it by 922.33 (the number of US teaspoons in one UK gallon).
  3. Round the result to the precision you need.
tsp = imp gal × 922.33

Worked example: 25 imp gal × 922.33 = 23058.2 tsp.

To convert US teaspoons back to UK gallons, multiply by 0.00108421, or divide by 922.33.

Source: NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units).

UK Gallons to US Teaspoons conversion table

UK Gallons to US Teaspoons conversion table
UK Gallons [imp gal]US Teaspoons [tsp]
0.01 imp gal9.2232954162 tsp
0.1 imp gal92.2329541618 tsp
1 imp gal922.3295416182 tsp
2 imp gal1844.6590832364 tsp
3 imp gal2766.9886248546 tsp
5 imp gal4611.647708091 tsp
10 imp gal9223.2954161819 tsp
20 imp gal18446.5908323638 tsp
50 imp gal46116.4770809095 tsp
100 imp gal92232.9541618191 tsp
1000 imp gal922329.5416181908 tsp

imp gal to tsp chart from 1 to 100

US Teaspoons to UK Gallons conversion table

US Teaspoons to UK Gallons conversion table
US Teaspoons [tsp]UK Gallons [imp gal]
0.01 tsp0.0000108421 imp gal
0.1 tsp0.0001084211 imp gal
1 tsp0.0010842112 imp gal
2 tsp0.0021684224 imp gal
3 tsp0.0032526335 imp gal
5 tsp0.0054210559 imp gal
10 tsp0.0108421118 imp gal
20 tsp0.0216842236 imp gal
50 tsp0.054210559 imp gal
100 tsp0.1084211179 imp gal
1000 tsp1.0842111793 imp gal

UK Gallons vs US Teaspoons

UK GallonUS Teaspoon
Symbolimp galtsp
Equals1 imp gal = 922.33 tsp1 tsp = 0.00108421 imp gal

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.

What is a US teaspoon?

A US customary cooking measure equal to 1/3 tablespoon. Used in US recipes for small quantities of ingredients.

Frequently asked questions

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 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 do I convert UK gallons to US teaspoons?

Multiply the number of UK gallons by 922.33. For example, 10 imp gal × 922.33 = 9,223.3 tsp. To convert back, multiply by 0.00108421.

What is 10 imp gal in US teaspoons?

10 imp gal = 9,223.3 tsp.

What is 100 imp gal in US teaspoons?

100 imp gal = 92,233 tsp.

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.

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Reviewed by

Dr. Muhammad Amjad Khadim PhD Mathematics

Dr. Muhammad Amjad Khadim holds a PhD in Mathematics. He writes and reviews the guides on pakmath.com and checks every formula, conversion factor and worked example against published standards and official guidance before it goes live. Spotted an error? Tell us and it will be corrected.

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First published 28 October 2026 · Last reviewed 5 November 2026