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Volume

Convert fluid ounces to UK gallons

1 fl oz=0.006505gal (UK)

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

0.0065053

Conversion formula

Forward
UK gallons = fluid ounces × 0.006505
Reverse
fluid ounces = UK gallons × 153.722

Example: 10 fl oz × 0.006505 = 0.06505 gal (UK).

About both units

From

Fluid Ounce

fl oz

The US fluid ounce equals 29.5735 millilitres — 1/128 of a US gallon. The UK fluid ounce (28.41 ml) is slightly smaller. Used for beverage can sizes in the US, cosmetic product sizes and many US cooking recipes. Do not confuse with the ounce of mass (28.35 g).

Real-world: A US soda can is 12 fl oz (355 ml). A Starbucks Tall is 12 fl oz; Grande is 16; Venti is 20.
Read full fluid ounce reference →
To

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 →

Fluid Ounce to UK Gallon conversion table

Common fluid ounces to UK gallons values for quick reference.

Fluid Ounce (fl oz)UK Gallon (gal (UK))
1 fl oz0.006505 gal (UK)
2 fl oz0.01301 gal (UK)
5 fl oz0.03253 gal (UK)
10 fl oz0.06505 gal (UK)
20 fl oz0.1301 gal (UK)
50 fl oz0.3253 gal (UK)
100 fl oz0.6505 gal (UK)
200 fl oz1.30105 gal (UK)
500 fl oz3.25263 gal (UK)
1,000 fl oz6.50527 gal (UK)

Tips & common mistakes

Quick tips

  • 1 US fl oz ≈ 29.6 ml; 1 UK fl oz ≈ 28.4 ml.
  • 8 US fl oz ≈ 1 US cup ≈ 237 ml.
  • Use ml to avoid ambiguity between US and UK fluid ounces.

Avoid these

  • Mixing US and UK fluid ounces — 16 fl oz (US) = 473 ml vs. 16 fl oz (UK) = 455 ml.
  • Confusing fluid ounce (volume) with avoirdupois ounce (mass).
  • Assuming 1 fl oz = 1 oz by weight — only true for pure water and approximately.

Frequently asked questions

How many UK gallons in a fluid ounce?
One fluid ounce equals 0.006505 UK gallons.
How do I convert fluid ounces to UK gallons?
Multiply the fluid ounce value by 0.006505 to get the equivalent in UK gallons.
What is 100 fluid ounces in UK gallons?
100 fluid ounces equals 0.6505 UK gallons.
Is a fluid ounce bigger than a uk gallon?
No. 1 fluid ounce equals 0.006505 UK gallons, so one fluid ounce is smaller.
How to convert fluid ounces to UK gallons without a calculator?
Multiply by 0.01 for a quick estimate; use a calculator for precise results.

Related volume conversions

📊 See full comparison matrix →

More from Fluid Ounce

fl oz → L
1 = 0.02957 L
fl oz → ml
1 = 29.5735 ml
fl oz → m³
1 = 2.9574e-5 m³
fl oz → gal (US)
1 = 0.007813 gal (US)
fl oz → cup
1 = 0.1232 cup
fl oz → pt
1 = 0.0625 pt
fl oz → qt
1 = 0.03125 qt
fl oz → tbsp
1 = 1.99821 tbsp

More to UK Gallon

L → gal (UK)
1 = 0.22 gal (UK)
ml → gal (UK)
1 = 0.00022 gal (UK)
m³ → gal (UK)
1 = 219.969 gal (UK)
gal (US) → gal (UK)
1 = 0.8327 gal (UK)
cup → gal (UK)
1 = 0.05279 gal (UK)
pt → gal (UK)
1 = 0.1041 gal (UK)
qt → gal (UK)
1 = 0.2082 gal (UK)
tbsp → gal (UK)
1 = 0.003256 gal (UK)

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