**Definitions:**

**US Gallon** (abbreviation: **US gal**): is a unit of measurement for liquid capacity in the US customary units. Three significantly different sizes are in current use: the imperial gallon defined as 4.54609 litres, which is used in the United Kingdom, Canada, and some Caribbean nations; the US gallon defined as 231 cubic inches (3.785 L), which is used in the US and some Latin American and Caribbean countries; and the least-used US dry gallon defined as 1/8 US bushel (4.405 L).

**Millimeter Cube** (abbreviation: **mm3**): is the SI derived unit of volume. It is the volume of a cube with edges one millimeter in length.

## How to Convert US Gallons to Millimeters Cube

*Example: How many millimeters cube are equivalent to 37.73 US gallons?*

As;

1 US gallons = 3785410 millimeters cube

37.73 US gallons = Y millimeters cube

Assuming Y is the answer, and by criss-cross principle;

Y equals 37.73 times 3785410 over 1

(i.e.) Y = 37.73 * 3785410 / 1 = 142823519.3 millimeters cube

Answer is: 142823519.3 millimeters cube are equivalent to 37.73 US gallons.

*Practice Question: Convert the following units into mm3:*

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 78.02 us gal

( ii ) 71.11 us gal

( iii ) 36.18 us gal