How many US cups are in one UK gallon?

One UK Imperial gallon equals approximately 19.2152 US customary cups. A US cup is defined as exactly 236.5882365 mL, and a UK gallon is exactly 4,546.09 mL, giving 4546.09 ÷ 236.5882365 ≈ 19.2152 cups.

How many metric cups are in one UK gallon?

One UK Imperial gallon equals approximately 18.1844 metric cups. A metric cup is exactly 250 mL, so 4546.09 mL ÷ 250 = 18.1844 metric cups.

What is the difference between a US cup and a metric cup?

A US customary cup is 236.5882365 mL while a metric cup (used in Australia, Canada, and other countries) is exactly 250 mL. The difference is about 5.5%, which matters in precise baking or cooking conversions.

What is the difference between a UK gallon and a US gallon?

The UK (Imperial) gallon is 4,546.09 mL, while the US liquid gallon is 3,785.41 mL. The Imperial gallon is roughly 20% larger. Always confirm which gallon is being used in a recipe or specification.

How do I convert cups back to UK gallons?

Divide the number of US cups by 19.2152, or divide the number of metric cups by 18.1844. For example, 38 US cups ÷ 19.2152 ≈ 1.978 UK gallons.

UK Gallons to Cups Converter

Name: UK Gallons to Cups Converter
Availability: InStock
Author: Nham Vu

Enter UK (Imperial) gallons and instantly get the equivalent in US cups and metric cups, plus a quick-reference table.

Enter UK Imperial Gallons

UK Imperial Gallons (gal)

Quick Reference Table

UK Gal	US Cups	Metric Cups

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Summary

Enter UK (Imperial) gallons and instantly get the equivalent in US cups and metric cups, plus a quick-reference table.

How it works

Enter a value in UK (Imperial) gallons in the input field.
The converter multiplies your input by 19.2152 to get US cups (1 UK gal = 4.54609 L ÷ 0.2365882365 L/cup).
It also multiplies by 18.1844 to get metric cups (1 UK gal = 4.54609 L ÷ 0.25 L/cup).
Both results appear instantly below the input.
Use the reference table to look up common gallon-to-cup conversions at a glance.

Use cases

Scale a UK recipe to US cup measurements when cooking abroad.
Convert bulk liquid ingredient volumes from Imperial gallons to cups for meal prep.
Check how many cups are in a large container measured in UK gallons.
Compare US versus metric cup results side by side for international recipes.
Calculate punch bowl or beverage quantities when buying by the Imperial gallon.
Convert drink dispenser capacity from gallons to cups for event planning.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu