Volume • NIST Exact

UK Gallons US Gallons

gal (UK) → gal (US)

Enter any value for instant conversion. Click on the result to copy with unit.

Reverse Conversion

NIST Exact

Based on U.S. National Institute of Standards

Privacy First

All calculations run in your browser

Instant Results

Real-time conversion as you type

Works Offline

No internet connection required

UK Gallons to US Gallons Formula

To convert from UK Gallons to US Gallons, you can use the following formula:

US Gallons = UK Gallons × 0.8326741846

This means you need to multiply your UK Gallons value by 0.8326741846 to get the equivalent value in US Gallons.

gal (UK) → gal (US) Reference Table

gal (UK) gal (US)
0.01 gal (UK) 0.01200949926 gal (US)
0.1 gal (UK) 0.1200949926 gal (US)
0.5 gal (UK) 0.6004749628 gal (US)
1 gal (UK) 1.200949926 gal (US)
5 gal (UK) 6.004749628 gal (US)
10 gal (UK) 12.00949926 gal (US)
50 gal (UK) 60.04749628 gal (US)
100 gal (UK) 120.0949926 gal (US)
500 gal (UK) 600.4749628 gal (US)
1000 gal (UK) 1200.949926 gal (US)

Values based on NIST SP 811 conversion factors

Why Convert UK Gallons to US Gallons?

Converting between uk gallons (gal (UK)) and us gallons (gal (US)) is one of the most common volume conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert gal (UK) to gal (US) saves time and prevents errors.

Volume conversions (gal (UK) to gal (US)) play a key role in the automotive industry, cooking, and chemical manufacturing. Drivers comparing engine displacement or fuel tank capacity need clear conversions to understand vehicle performance and range. In the kitchen, converting liquid ingredients like milk, oil, or broth is essential when adapting recipes from different regions. For industrial applications, mixing chemical solutions requires exact volume measurements to maintain product stability and safety. An error in volume conversion can lead to mechanical failures, ruined culinary creations, or hazardous chemical reactions, making precision indispensable.

How to Convert UK Gallons to US Gallons

To convert uk gallons to us gallons, use the following formula:

gal (US) = gal (UK) × 1.200949926

Example: 1 gal (UK) = 1.200949926 gal (US)

For example, 5 gal (UK) = 6.004749628 gal (US), 10 gal (UK) = 12.00949926 gal (US), and 100 gal (UK) = 120.0949926 gal (US). For larger values, 1000 gal (UK) = 1200.949926 gal (US). Conversely, 1 gal (US) = 0.8326741846 gal (UK). Our calculator above performs this conversion instantly with full precision — no rounding errors.

Common Mistakes to Avoid

  • Fluid vs Dry: confusing fluid pints/quarts with dry pints/quarts.
  • US vs Imperial: US gallons are smaller than UK Imperial gallons.
  • Cubic conversion: forgetting to cube linear factors (1 m = 100 cm, 1 m³ = 1,000,000 cm³).

Pro Tips

  • Cooking spoon: 1 Tablespoon = 3 Teaspoons = 15 ml.
  • Cup size: A standard US cup is 240ml, but metric cup is often 250ml.
  • Cube visual: 1 cubic meter is a box 1m x 1m x 1m (huge!).

What is a UK Gallon?

The Imperial gallon, defined as exactly 4.54609 liters.

Used in the UK for fuel and draught beer.

What is a US Gallon?

The US liquid gallon is a unit of volume in the US customary system. It is legally defined as 231 cubic inches, which is exactly 3.785411784 liters.

Gallons are the standard unit for gasoline (fuel), milk, and large liquid containers in the United States and some Latin American countries.

Frequently Asked Questions

Ready to convert? Try our free calculator now.

Start Converting

Need File Conversion?

Convert images and documents between formats — JPG, PNG, WebP, PDF, and more. 100% client-side, your files never leave your browser.

Try File Converter →