How to convert imperial gallons to us gallons
To convert a measurement in imperial gallons to us gallons, multiply the value by 1.20095. The conversion factor comes from the relationship between both units and the liter.
For example, to convert 5 imp gal to us gallons: 5 × 1.20095 = 6.00475 gal.
What is a imperial gallon?
An imperial gallon is a British unit of volume equal to exactly 4.54609 liters, about 20% larger than the US gallon. The imperial gallon was defined in 1824 as the volume of ten pounds of water. It is still used in the UK and several Commonwealth countries, which is why UK 'miles per gallon' figures look higher than US ones.
Common uses of imperial gallons include: Fuel and fuel-economy figures in the UK and Canada; Historical and Commonwealth liquid measures; Comparing UK vs US gallon quantities; Agricultural and industrial liquid volumes.
What is a us gallon?
A US gallon is a US customary unit of volume equal to 4 quarts, 128 fluid ounces, or exactly 3.785411784 liters. The US gallon is based on the old English wine gallon of 231 cubic inches. It is smaller than the imperial gallon used in the UK and Commonwealth, a frequent source of fuel-economy confusion.
Common uses of us gallons include: Fuel sold at the pump in the US; Milk, water, and beverage jug sizes; Paint and household liquid quantities; Vehicle fuel-economy figures (miles per gallon).
Imperial Gallons to us gallons worked examples
Here are some common values converted:
1 imp gal = 1.20095 gal 5 imp gal = 6.00475 gal 10 imp gal = 12.009499 gal 50 imp gal = 60.047496 gal 100 imp gal = 120.094993 gal
Frequently asked questions
How many us gallons are in one imperial gallon?
One imperial gallon (imp gal) equals 1.20095 us gallons (gal). Multiply any value in imperial gallons by 1.20095 to convert to us gallons.
How do I convert imperial gallons to us gallons?
Multiply the value in imperial gallons by 1.20095. For example, 5 imp gal × 1.20095 = 6.00475 gal.
How do I convert us gallons to imperial gallons?
Multiply the value in us gallons by 0.832674184629, or divide by 1.20095. Use the swap button on the converter above to reverse the direction.
Is the imperial gallon to us gallon conversion exact?
Conversions between metric volumes are exact by definition. US and imperial volumes are defined exactly relative to the liter, so these factors are exact.
What is the formula for imperial gallons to us gallons?
The formula is: gal = imp gal × 1.20095. This comes from the definition of both units relative to the liter.