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Imperial Gallon to US Fluid Ounce Converter

VerifiedLast reviewed: Apr 13, 2026Fact checked by: Adil BaltiFactor: 1 gal (imp) = 153.721593 fl ozSource: NIST
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What is Imperial Gallon to US Fluid Ounce Converter

An imperial gallon to US fluid ounce converter transforms volume values from imperial gallons (Imp gal) into US fluid ounces (fl oz). The tool is based on the accurate relationship where one imperial gallon equals approximately 153.72 US fluid ounces.

Definitions of Imperial Gallon and US Fluid Ounce

What is Imperial Gallon?

An imperial gallon is a unit of liquid volume used in the British imperial system equal to approximately 4.546 liters. It was historically used throughout the British Commonwealth.

What is US Fluid Ounce?

A US fluid ounce is a unit of liquid volume equal to 1/128th of a US gallon. It is commonly used for beverages, cosmetics, and liquid medication dosages.

Imperial Gallon to US Fluid Ounce Formula

fl oz=gal (Imp)×153.721593\text{fl\ oz} = \text{gal\ (Imp)} \times 153.721593

Conversion explanation: Multiply the value in Imperial Gallon by 153.7215933885 to get the equivalent value in US Fluid Ounce.

How to Convert Imperial Gallon to US Fluid Ounce

To convert a value from imperial gallons to us fluid ounces, multiply the value by the conversion multiplier:

US Fluid Ounces = Imperial Gallons × 153.7215933885

Step-by-Step Example

Converting a 5 imperial gallon volume into us fluid ounce:

  • Identify the multiplier factor: 153.7215933885.
  • Multiply 5 by the factor: 5 × 153.7215933885 = 768.6079669423.
  • Result: 5 imperial gallons is equal to 768.6079669423 us fluid ounces.

Imperial Gallon to US Fluid Ounce Conversion Table

Imperial Gallon [gal (imp)]US Fluid Ounce [fl oz]
0.01 gal (imp)1.5372159339 fl oz
0.1 gal (imp)15.3721593388 fl oz
1 gal (imp)153.7215933885 fl oz
2 gal (imp)307.4431867769 fl oz
3 gal (imp)461.1647801654 fl oz
4 gal (imp)614.8863735539 fl oz
5 gal (imp)768.6079669423 fl oz
6 gal (imp)922.3295603308 fl oz
7 gal (imp)1076.0511537193 fl oz
8 gal (imp)1229.7727471077 fl oz
9 gal (imp)1383.4943404962 fl oz
10 gal (imp)1537.2159338847 fl oz
20 gal (imp)3074.4318677693 fl oz
30 gal (imp)4611.647801654 fl oz
50 gal (imp)7686.0796694233 fl oz
100 gal (imp)15372.1593388466 fl oz
500 gal (imp)76860.7966942329 fl oz
1000 gal (imp)153721.5933884658 fl oz
Rate This Imperial Gallon to US Fluid Ounce Converter:
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