Convert UK gallons to cups

1 gal (UK)=18.942cup

Use the converter below to change any UK gallons value into cups instantly — with formula, conversion table, and real-world examples.

You have

Equals

18.94204

Conversion formula

Forward

cups = UK gallons × 18.942

Reverse

UK gallons = cups × 0.05279

Example: 10 gal (UK) × 18.942 = 189.42 cup.

About both units

From

UK Gallon

gal (UK)

The UK imperial gallon equals 4.54609 litres exactly. Defined in 1824 as the volume of 10 pounds of water at 62 °F. Still used for fuel economy reporting in the UK and some older industrial contexts. The UK imperial gallon is about 20% larger than the US gallon.

Real-world: UK petrol sold by litre since 1995, but economy is quoted in UK mpg: a diesel car at 60 mpg (UK) uses 4.7 L/100 km.

Read full uk gallon reference →

Cup

cup

The US cup equals 240 millilitres in common usage (legally defined as 236.588 ml). The metric cup (Australia, NZ) is 250 ml; the UK "cup" is 284 ml but rarely used in recipes. Cooking recipes from the US dominate online, so 240 ml is the safe default for "cup".

Real-world: 1 cup of water = 240 g = 240 ml. 1 cup of all-purpose flour weighs about 125 g. A Starbucks Tall is 12 fl oz = 1.5 cups.

Read full cup reference →

UK Gallon to Cup conversion table

Common UK gallons to cups values for quick reference.

UK Gallon (gal (UK))	Cup (cup)
1 gal (UK)	18.942 cup
2 gal (UK)	37.8841 cup
5 gal (UK)	94.7102 cup
10 gal (UK)	189.42 cup
20 gal (UK)	378.841 cup
50 gal (UK)	947.102 cup
100 gal (UK)	1,894.2 cup
200 gal (UK)	3,788.41 cup
500 gal (UK)	9,471.02 cup
1,000 gal (UK)	18,942.04 cup

Tips & common mistakes

Quick tips

1 UK gallon = 4.54609 L exactly = 160 UK fluid ounces.
1 UK gallon ≈ 1.201 US gallons.
UK mpg × 0.832 = US mpg (same car, different unit).

Avoid these

Comparing UK mpg with US mpg directly — UK figures are about 20% higher for the same car.
Using 4.5 L instead of 4.546 L for precise conversion.
Assuming modern UK car ads quote US gallons — they always use UK gallons.

Frequently asked questions

How many cups in a uk gallon?

One uk gallon equals 18.942 cups.

How do I convert UK gallons to cups?

Multiply the uk gallon value by 18.942 to get the equivalent in cups.

What is 100 UK gallons in cups?

100 UK gallons equals 1,894.2 cups.

Is a uk gallon bigger than a cup?

Yes. 1 uk gallon equals 18.942 cups, so one uk gallon is larger.

How to convert UK gallons to cups without a calculator?

Multiply by 18.94 for a quick estimate; use a calculator for precise results.

Related volume conversions

📊 See full comparison matrix →

Conversions in other categories

WeightKilogram → Pound LengthKilometer → Mile TemperatureCelsius → Fahrenheit AreaSquare Meter → Square Foot SpeedKilometer per Hour → Mile per Hour EnergyKilojoule → Kilocalorie PressureBar → Pound per Square Inch PowerKilowatt → Mechanical Horsepower

Convert UK gallons to cups

🧮 Conversion formula