What is US gallon?

A US gallon is a volume unit equal to 128 US fluid ounces, or approximately 3.785 litres. It is the standard unit for fuel, milk, and other liquid products in the United States.

What is cubic metre?

A cubic metre is the SI unit of volume, equal to a cube with one-metre sides. It is used in construction, water supply, industrial gas storage, and large-scale fluid measurement.

Worked examples

1 US gallon = 0.00378541 cubic metre

1 cubic metre = 1,000 litre