Gallon (UK) to Fluid Ounce (UK) Converter

Volume Converter

40 units available

Decimals:

From

To

160

1 gal (UK) = 160 fl oz (UK)

Formula:

fl oz (UK) = gal (UK) × 160

With your value: 1 gal (UK) = 160 fl oz (UK)

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 Fluid Ounce (UK) conversions

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

Gallon (UK) to Fluid Ounce (UK) Conversion Table

Gallon (UK) (gal (UK))	Fluid Ounce (UK) (fl oz (UK))
0.5	80
1	160
2	320
5	800
10	1,600
15	2,400
20	3,200
25	4,000
50	8,000
100	16,000
250	40,000
500	80,000
1000	160,000

Fluid Ounce (UK) to Gallon (UK) Conversion Table

Fluid Ounce (UK) (fl oz (UK))	Gallon (UK) (gal (UK))
0.5	0.003125
1	0.00625
2	0.0125
5	0.03125
10	0.0625
15	0.09375
20	0.125
25	0.15625
50	0.3125
100	0.625
250	1.5625
500	3.125
1000	6.25

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

Fluid Ounce (UK) (fl oz (UK))

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 Fluid Ounce (UK)

To convert from Gallon (UK) (gal (UK)) to Fluid Ounce (UK) (fl oz (UK)), multiply the value by 160.

Formula: fl oz (UK) = gal (UK) × 160

Reverse: gal (UK) = fl oz (UK) × 0.00625

Step-by-Step Example

Start with your value in Gallon (UK). For example: 5 gal (UK)
Multiply by the conversion factor: 5 x 160
The result is: 800 fl oz (UK)

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 Fluid Ounce (UK)

The fluid ounce (uk) (fl oz (UK)) is a unit of volume and capacity. One fluid ounce (uk) equals 0.0284130625 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 Fluid Ounce (UK) are in 1 Gallon (UK)?

There are exactly 160 Fluid Ounce (UK) in 1 Gallon (UK). This means the conversion factor from Gallon (UK) to Fluid Ounce (UK) is 160.

What is the formula to convert Gallon (UK) to Fluid Ounce (UK)?

The formula to convert Gallon (UK) to Fluid Ounce (UK) is: fl oz (UK) = gal (UK) × 160. For example, to convert 10 Gallon (UK) to Fluid Ounce (UK), you would multiply 10 by 160.

What is a Gallon (UK)?