How many teaspoons are in 1 UK gallon?

About 909.218 metric teaspoons (5 ml each). A UK imperial gallon is 4,546.09 ml, and dividing by 5 ml per teaspoon gives 909.218.

Is a UK gallon the same as a US gallon?

No. A UK (imperial) gallon is 4,546.09 ml, while a US gallon is only 3,785.41 ml. The UK gallon is about 20% larger, so always confirm which gallon your recipe or spec uses.

Which teaspoon size does this converter use?

The international metric teaspoon of exactly 5 ml, which is standard in most countries and in modern cooking references. Older UK recipes sometimes use a 4.73553 ml teaspoon — if precision matters, note this difference.

Can I convert fractional gallons?

Yes. Enter any decimal value such as 0.5 or 2.75 and the converter handles it correctly.

How do I convert teaspoons back to UK gallons?

Type the teaspoon count into the lower field, or click "Swap" after entering gallons. The tool divides by 909.218 to give the UK gallon equivalent.

UK Gallons to Teaspoons Converter

Convert UK (imperial) gallons to teaspoons instantly, with reverse conversion from teaspoons back to UK gallons.

Convert

UK Gallons (imperial)

gal

Teaspoons (5 ml metric)

tsp

Result

Enter a value on the left to see the result.

Quick Reference

UK Gallons	Teaspoons (metric 5 ml)
0.125 gal (1 pint)	113.65 tsp
0.25 gal (1 quart)	227.30 tsp
0.5 gal	454.61 tsp
1 gal	909.22 tsp
2 gal	1,818.44 tsp
5 gal	4,546.09 tsp
10 gal	9,092.18 tsp

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Summary

Convert UK (imperial) gallons to teaspoons instantly, with reverse conversion from teaspoons back to UK gallons.

How it works

Enter a value in the UK gallons field.
The converter multiplies by 909.218 (since 1 UK gallon = 4,546.09 ml ÷ 5 ml = 909.218 teaspoons).
The teaspoon result appears immediately below.
Use the reverse field to convert teaspoons back to UK gallons.
Click "Swap" to exchange the two values at any time.

Use cases

Scale up brewing recipes that list ingredients in gallons.
Convert large cooking quantities to spoon-sized measurements.
Cross-check imperial volume conversions in lab or industrial settings.
Quickly find how many teaspoons of liquid fit in a gallon container.
Teach or verify imperial measurement relationships.

Frequently Asked Questions

Last updated: 2026-09-19 · Reviewed by Nham Vu