Answer:

A Litre is a measure of capacity (Volume). 1 litre is 1000 cubic centimeters, about 1¾ pints. Litre is abbreviated to l. 1 gallon is about 4.55 litres.

The petrol tank of a typical small car holds about 40 litres. A bath uses about 90 litres; a shower is more economical, using only about 30 litres. Litres are most commonly used for items (such as fluids and berries) which are measured by the capacity or size of their container, whereas cubic metres (and derived units) are most commonly used for items measured either by their dimensions or their displacements.

The litre is often also used in some calculated measurements, such as density (kg/L), allowing an easy comparison with the density of water.

One litre of water has a mass of almost exactly one kilogram when measured at its maximal density, which occurs at about 4 degrees celsius. Similarly, 1 millilitre of water has about 1 g of mass; 1,000 litres of water has about 1,000 kg of mass. This relationship is because the gram was originally defined as the mass of 1 ml of water.