Convert UK gallons to cubic meters

1 gal (UK)=0.004546m³

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

You have

Equals

0.0045461

Conversion formula

Forward

cubic meters = UK gallons × 0.004546

Reverse

UK gallons = cubic meters × 219.969

Example: 10 gal (UK) × 0.004546 = 0.04546 m³.

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 →

Cubic Meter

m³

The cubic metre is the SI derived unit of volume, equal to 1000 litres. It is used for large quantities — water supply, natural gas, concrete, shipping containers and storage tanks. A 20-foot shipping container holds about 33 m³.

Real-world: A 20 ft shipping container holds ~33 m³. UK household water use is ~130 m³/year. Natural gas is billed per m³ in Europe.

Read full cubic meter reference →

UK Gallon to Cubic Meter conversion table

Common UK gallons to cubic meters values for quick reference.

UK Gallon (gal (UK))	Cubic Meter (m³)
1 gal (UK)	0.004546 m³
2 gal (UK)	0.009092 m³
5 gal (UK)	0.02273 m³
10 gal (UK)	0.04546 m³
20 gal (UK)	0.09092 m³
50 gal (UK)	0.2273 m³
100 gal (UK)	0.4546 m³
200 gal (UK)	0.9092 m³
500 gal (UK)	2.27305 m³
1,000 gal (UK)	4.54609 m³

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 cubic meters in a uk gallon?

One uk gallon equals 0.004546 cubic meters.

How do I convert UK gallons to cubic meters?

Multiply the uk gallon value by 0.004546 to get the equivalent in cubic meters.

What is 100 UK gallons in cubic meters?

100 UK gallons equals 0.4546 cubic meters.

Is a uk gallon bigger than a cubic meter?

No. 1 uk gallon equals 0.004546 cubic meters, so one uk gallon is smaller.

How to convert UK gallons to cubic meters without a calculator?

Multiply by 0 for a quick estimate; use a calculator for precise results.

Related volume conversions

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