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Convert US Fluid Ounces to Imperial Gallons

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Measurement

Volume Converter
10 sig. figures
Formula1 US fl oz ร— 0.006505267067 = 0.006505267067 imp gal
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About Volume Conversions

Volume trips people up because US customary and imperial units share names but not sizes. A US gallon (3.785 liters) runs about 17% smaller than an imperial gallon (4.546 liters), and the gap carries down into pints, quarts, and fluid ounces. Cooking is where it bites: a British recipe's pint of milk is 568 ml, an American pint only 473 ml. Science sidesteps the mess with metric volume, where 1 mL equals exactly 1 cmยณ. US and imperial variants stay separate below, with exact conversion chains holding precision across the swap.

Quick Conversions

US Fluid OuncesImperial Gallons
1 US fl oz0.00650527 imp gal
2 US fl oz0.0130105 imp gal
5 US fl oz0.0325263 imp gal
10 US fl oz0.0650527 imp gal
25 US fl oz0.162632 imp gal
50 US fl oz0.325263 imp gal
100 US fl oz0.650527 imp gal
250 US fl oz1.62632 imp gal
500 US fl oz3.25263 imp gal
1000 US fl oz6.50527 imp gal
Unit NameSymbolPer 1 US Fluid Ounce
Cubic Centimetercmยณ29.5735
Cubic Footftยณ0.00104438
Cubic Inchinยณ1.80469
Cubic Metermยณ0.0000295735
Imperial Fluid Ounceimp fl oz1.04084
Imperial Gallonimp gal0.00650527
Imperial Pintimp pt0.0520421
LiterL0.0295735
MillilitermL29.5735
US CupUS cup0.125
US Fluid OunceUS fl oz1
US GallonUS gal0.0078125
US PintUS pt0.0625
US QuartUS qt0.03125
US TablespoonUS tbsp2
US TeaspoonUS tsp6

Frequently Asked Questions

How do I convert US Fluid Ounces to Imperial Gallons?

To convert US Fluid Ounces to Imperial Gallons, use the conversion where 1 US Fluid Ounce (US fl oz) = 0.00650527 Imperial Gallons (imp gal). For example, 1 US Fluid Ounce = 0.00650527 Imperial Gallons.

What are common US Fluid Ounce to Imperial Gallon conversions?

Here are common conversions: 1 US Fluid Ounces = 0.00650527 Imperial Gallons, 5 US Fluid Ounces = 0.0325263 Imperial Gallons, 10 US Fluid Ounces = 0.0650527 Imperial Gallons, 25 US Fluid Ounces = 0.162632 Imperial Gallons, 50 US Fluid Ounces = 0.325263 Imperial Gallons, 100 US Fluid Ounces = 0.650527 Imperial Gallons.

When would I need to convert US Fluid Ounces to Imperial Gallons?

Volume conversions come up when scaling recipes between metric (milliliters, liters) and US customary units (cups, fluid ounces), calculating fuel tank capacities across regions, and in chemistry and manufacturing where a precise liquid measurement decides the outcome.

How precise are the conversions?

All conversions use exact factors verified against NIST and ISO standards with up to 10 significant figures of precision. Results are calculated using IEEE 754 double-precision arithmetic, which provides approximately 15-17 significant digits. For temperature and other non-linear conversions, exact formulas are used rather than approximations.

Sources

Read our full methodology โ†’