Convert Imperial gallon (gal UK) (gal_uk) to US gallon (gal) (gal)
Category: Volume
1 gal_uk = 1.20095 gal
High-precision rounding: 6 decimals
How to convert imperial gallon (gal uk) to us gallon (gal)
We convert by pivoting through the SI base unit for Volume and applying exact factors where applicable.
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Quick conversion table
Handy values for Imperial gallon (gal UK) → US gallon (gal). Click a value to open that exact result.
Conversion formula
Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).
Common mistakes
- Mixing US gallons (3.785 L) with Imperial gallons (4.546 L).
- Assuming kitchen ‘cup’ equals the same volume in every country.
Unit facts
- Imperial gallon (gal UK): The Imperial gallon is exactly 4.54609 L; still used in the UK for beer, milk, and fuel economy.
- US gallon (gal): The US gallon is exactly 3.785411784 L; used for fuel, beverages, and bulk liquids.
About Volume
Volume measures the space a substance occupies. SI uses cubic meters and liters; customary units like gallons, quarts, and pints persist in recipes, fuel, and containers. Accurate volume work often requires temperature and density considerations (e.g., for fuels).
About Imperial gallon (gal UK)
Imperial gallon (UK)
Exactly 4.54609 L. Still appears in UK fuel economy (mpg) and historical tables.
History: Set by the 1824 Weights and Measures Act; differs notably from the US gallon.
About US gallon (gal)
US gallon (gal)
Exactly 3.785411784 L. Used for fuel, containers, and recipes in the US. Beware of imperial gallon differences.
History: US defined the gallon separately from the British imperial revision; modern value is exact.
Related conversions from gal_uk
- gal_uk → bbl Barrel (oil, bbl)
- gal_uk → ft3 Cubic foot (ft³)
- gal_uk → in3 Cubic inch (in³)
- gal_uk → m3 Cubic meter (m³)
- gal_uk → cup Cup (US)
- gal_uk → l Liter (L)