Cubic Inch to Gallon (UK) Converter

Volume Converter

40 units available

Decimals:

From

To

0.003605

1 in³ = 0.003605 gal (UK)

Formula:

gal (UK) = in³ × 0.0036046501

With your value: 1 in³ = 0.00360465 gal (UK)

How big is that?

Everyday references on a logarithmic scale, all expressed in cubic inch so you can sanity-check the result.

Soda can (1/50 your value)0.0201 in³

Milk carton (1/16 your value)0.0610 in³

Kitchen bucket (1/1.6 your value)0.610 in³

Your value1.00 in³

Car fuel tank (3.1× your value)3.05 in³

Bathtub (12× your value)12.2 in³

Other Cubic Inch to Gallon (UK) conversions

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

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

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

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.

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

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

How to Convert Cubic Inch to Gallon (UK)

To convert from Cubic Inch (in³) to Gallon (UK) (gal (UK)), multiply the value by 0.0036046501.

Formula: gal (UK) = in³ × 0.0036046501

Reverse: in³ = gal (UK) × 277.4194327916

Step-by-Step Example

Start with your value in Cubic Inch. For example: 5 in³
Multiply by the conversion factor: 5 x 0.0036046501
The result is: 0.018023 gal (UK)

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.

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.

Frequently Asked Questions

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

There are exactly 0.0036046501 Gallon (UK) in 1 Cubic Inch. This means the conversion factor from Cubic Inch to Gallon (UK) is 0.0036046501.

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

The formula to convert Cubic Inch to Gallon (UK) is: gal (UK) = in³ × 0.0036046501. For example, to convert 10 Cubic Inch to Gallon (UK), you would multiply 10 by 0.0036046501.

What is a Cubic Inch?