UK Gallons to US Quarts Converter

How to convert UK Gallons to US Quarts

To convert UK Gallons to US Quarts, multiply the value in UK Gallons by 4.8037994. For example, 5 gal = 24.018997 qt.

If you need to convert from UK Gallons to US Quarts, the key figure to remember is that one UK Gallons equals 4.8037994 US Quarts. This page gives you a live calculator, a full reference table, and the underlying formula so you can convert gal to qt with complete confidence.

Volume conversions are essential in the kitchen, in science, and in any situation involving liquids or capacity. They're also one of the trickiest areas because US and UK (imperial) measurements share names but differ in size.

Understanding UK Gallons and US Quarts

A US gallon (3.785 liters) is noticeably smaller than a UK gallon (4.546 liters) — about 20% less. The same applies to pints, quarts, and fluid ounces. Cups, tablespoons, and teaspoons are the backbone of recipe measurement, while liters and milliliters dominate scientific and most international contexts. This US/UK split is the single biggest source of error in volume conversion.

How accurate is this conversion?

Volume conversions here use the internationally accepted definitions: the US gallon is exactly 3.785411784 liters and the imperial gallon is exactly 4.54609 liters. Always confirm which system a recipe or specification uses before converting.

All conversion factors on ClearUnits are based on internationally recognised standards (the International System of Units, SI, and official definitions). Factors are reviewed for accuracy and the calculator uses full-precision values, rounding only the displayed result.

Quick reference: common UK Gallons to US Quarts values

The most frequently searched conversions are 1 UK Gallons = 4.8037994 US Quarts, 5 UK Gallons = 24.018997 US Quarts, 10 UK Gallons = 48.037994 US Quarts, and 100 UK Gallons = 480.37994 US Quarts. The full table further down covers every common value, and the calculator handles any number you need in between.