How to convert imperial gallons to cubic inches
To convert a measurement in imperial gallons to cubic inches, multiply the value by 277.419433. The conversion factor comes from the relationship between both units and the liter.
For example, to convert 5 imp gal to cubic inches: 5 × 277.419433 = 1,387.0972 in³.
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 cubic inch?
A cubic inch is an imperial and US customary unit of volume equal to the space of a cube one inch on each side, exactly 16.387064 milliliters. The cubic inch was the traditional way to express American engine displacement (e.g. a '350 cubic inch' V8) before the metric liter became common. It remains in use in US manufacturing and packaging.
Common uses of cubic inches include: Classic and American V8 engine displacement; Packaging and box volume in the US; Woodworking and material volume; Compressor and pump specifications.
Imperial Gallons to cubic inches worked examples
Here are some common values converted:
1 imp gal = 277.419433 in³ 5 imp gal = 1,387.0972 in³ 10 imp gal = 2,774.1943 in³ 50 imp gal = 13,870.9716 in³ 100 imp gal = 27,741.9433 in³
Frequently asked questions
How many cubic inches are in one imperial gallon?
One imperial gallon (imp gal) equals 277.419433 cubic inches (in³). Multiply any value in imperial gallons by 277.419433 to convert to cubic inches.
How do I convert imperial gallons to cubic inches?
Multiply the value in imperial gallons by 277.419433. For example, 5 imp gal × 277.419433 = 1,387.0972 in³.
How do I convert cubic inches to imperial gallons?
Multiply the value in cubic inches by 0.00360465015, or divide by 277.419433. Use the swap button on the converter above to reverse the direction.
Is the imperial gallon to cubic inch 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 cubic inches?
The formula is: in³ = imp gal × 277.419433. This comes from the definition of both units relative to the liter.