Measurement system: Imperial → US/Imperial length-derived

Convert Imperial gallon (imp gal) → cubic inch (in³)

1 imp gal equals 277.419432792 in³. The name of a customary unit matters: US liquid and Imperial units are not interchangeable.

Why the distinction matters

Imperial gallon and cubic inch belong to measurement conventions that may look familiar but are not always equivalent across countries. Mendeleev.com therefore keeps the system name next to the abbreviation and calculates from defined conversion factors rather than rounded kitchen rules.

Example

1 imp gal = 277.419432792 in³ · 10 imp gal = 2 774.19433 in³.

Imperial gallon

277.419432792 in³

How to use this conversion

The conversion keeps the physical quantity unchanged; only the unit used to express it changes. Apply the relation below, keep the unit with the number, and round only at the end.

1 imp gal = 277.419432792 in³ · 10 imp gal = 2 774.19433 in³.