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Imperial fluid ounce to US gallon Converter

Type a value — the answer appears instantly. 1 fl oz (UK) = 0.00750594 gal.

Reviewed by the OmniCalc teamMethod verified 2026-07-01

From unit

To unit
Result

0.00750594 US gallons

= 0.0284131 L= 28.4131 ml

equals 0.00750594 US gallons

Formula: gal = fl oz (UK) × 0.007505937

Imperial fluid ounce to US gallon formula

gal = fl oz (UK) × 0.007505937

Convert 5 imperial fluid ounces to US gallons

  1. Start with 5 imperial fluid ounces.
  2. Multiply by the conversion factor: 5 × 0.00750594 = 0.0375297.
  3. So 5 fl oz (UK) = 0.0375297 gal.

Imperial fluid ounce to US gallon conversion table

Imperial fluid ounce to US gallon conversion table
Imperial fluid ounces (fl oz (UK))US gallons (gal)
0.01 fl oz (UK)0.0000750594 gal
0.1 fl oz (UK)0.000750594 gal
0.25 fl oz (UK)0.00187648 gal
0.5 fl oz (UK)0.00375297 gal
1 fl oz (UK)0.00750594 gal
2 fl oz (UK)0.0150119 gal
3 fl oz (UK)0.0225178 gal
4 fl oz (UK)0.0300237 gal
5 fl oz (UK)0.0375297 gal
6 fl oz (UK)0.0450356 gal
7 fl oz (UK)0.0525416 gal
8 fl oz (UK)0.0600475 gal
9 fl oz (UK)0.0675534 gal
10 fl oz (UK)0.0750594 gal
15 fl oz (UK)0.112589 gal
20 fl oz (UK)0.150119 gal
25 fl oz (UK)0.187648 gal
30 fl oz (UK)0.225178 gal
40 fl oz (UK)0.300237 gal
50 fl oz (UK)0.375297 gal
75 fl oz (UK)0.562945 gal
100 fl oz (UK)0.750594 gal
250 fl oz (UK)1.87648 gal
500 fl oz (UK)3.75297 gal
1,000 fl oz (UK)7.50594 gal
5,000 fl oz (UK)37.5297 gal
10,000 fl oz (UK)75.0594 gal

Unit definitions

What is a imperial fluid ounce?

The imperial (UK) fluid ounce is one 160th of an imperial gallon, about 28.41 millilitres. It is used in the United Kingdom and Commonwealth countries. It is slightly smaller than the US fluid ounce.

What is a US gallon?

The US gallon is defined as exactly 231 cubic inches, or 3.785411784 litres. It is the standard unit for fuel, milk, and large liquid quantities in the United States. It is about 20% smaller than the imperial gallon.

Frequently asked questions

How many US gallons are in one imperial fluid ounce?

One imperial fluid ounce equals 0.00750594 US gallons (1 fl oz (UK) = 0.00750594 gal).

How do I convert imperial fluid ounces to US gallons?

Multiply the value in imperial fluid ounces by 0.00750594. For example, 10 fl oz (UK) × 0.00750594 = 0.0750594 gal.

Which is bigger — a imperial fluid ounce or a US gallon?

A US gallon is bigger: one US gallon contains 133.23 imperial fluid ounces.

Is this imperial fluid ounce to US gallon converter free?

Yes — the converter is free, works offline once loaded, and computes instantly in your browser without sending your numbers to a server.

Conversion factors follow international definitions (SI / NIST). Last verified 2026-07-01.