Gallon (UK) to Cubic Inch Converter

Volume Converter

40 units available

Decimals:

From

To

277.419433

1 gal (UK) = 277.419433 in³

Formula:

in³ = gal (UK) × 277.4194327916

With your value: 1 gal (UK) = 277.41943279 in³

How big is that?

Everyday references on a logarithmic scale, all expressed in gallon (uk) so you can sanity-check the result.

Milk carton (1/4.5e+3 your value)0.000220 gal (UK)

Kitchen bucket (1/4.5e+2 your value)0.00220 gal (UK)

Car fuel tank (1/91 your value)0.0110 gal (UK)

Bathtub (1/23 your value)0.0440 gal (UK)

Hot tub (1/3.0 your value)0.330 gal (UK)

Your value1.00 gal (UK)

Other Gallon (UK) to Cubic Inch conversions

2 gal (UK) to in³ 3 gal (UK) to in³ 4 gal (UK) to in³ 5 gal (UK) to in³ 6 gal (UK) to in³ 7 gal (UK) to in³ 8 gal (UK) to in³

Gallon (UK) to Cubic Inch Conversion Table

Gallon (UK) (gal (UK))	Cubic Inch (in³)
0.5	138.709716
1	277.419433
2	554.838866
5	1,387.097164
10	2,774.194328
15	4,161.291492
20	5,548.388656
25	6,935.48582
50	13,870.97164
100	27,741.943279
250	69,354.858198
500	138,709.716396
1000	277,419.432792

Cubic Inch to Gallon (UK) Conversion Table

Cubic Inch (in³)	Gallon (UK) (gal (UK))
0.5	0.001802
1	0.003605
2	0.007209
5	0.018023
10	0.036047
15	0.05407
20	0.072093
25	0.090116
50	0.180233
100	0.360465
250	0.901163
500	1.802325
1000	3.60465

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Gallon (UK) (gal (UK))

Volume

Exact conversion

The imperial gallon is exactly 4.546 09 L (Weights and Measures Act 1985).

Source: NIST Handbook 44, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Cubic Inch (in³)

Volume

Exact conversion

Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Gallon (UK) to Cubic Inch

To convert from Gallon (UK) (gal (UK)) to Cubic Inch (in³), multiply the value by 277.4194327916.

Formula: in³ = gal (UK) × 277.4194327916

Reverse: gal (UK) = in³ × 0.0036046501

Step-by-Step Example

Start with your value in Gallon (UK). For example: 5 gal (UK)
Multiply by the conversion factor: 5 x 277.4194327916
The result is: 1,387.097164 in³

About Gallon (UK)

The imperial gallon equals exactly 4.54609 litres, about 20% larger than the US gallon — a frequent source of fuel-economy confusion.

Common uses: UK fuel figures, brewing, older recipes.

About Cubic Inch

The cubic inch (in³) is a unit of volume and capacity. One cubic inch equals 0.016387064 litres. UnitConvertLab converts it against every other volume unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: volume calculations, engineering and science, education.

Frequently Asked Questions

How many Cubic Inch are in 1 Gallon (UK)?

There are exactly 277.4194327916 Cubic Inch in 1 Gallon (UK). This means the conversion factor from Gallon (UK) to Cubic Inch is 277.4194327916.

What is the formula to convert Gallon (UK) to Cubic Inch?

The formula to convert Gallon (UK) to Cubic Inch is: in³ = gal (UK) × 277.4194327916. For example, to convert 10 Gallon (UK) to Cubic Inch, you would multiply 10 by 277.4194327916.

What is a Gallon (UK)?