Yes. Four quarts to a gallon. An imperial gallon = 4.546 Liters. A U.S. gallon = 3.7854 Liters.
A litre is a metric unit. A quart is two pints - an imperial unit.
A quart is an English unit.
liters is the answer
The metric unit is a millilitre. The metric unit is a millilitre. The metric unit is a millilitre. The metric unit is a millilitre.
Milliliters is the metric unit to use for the capacity of a thimble.
Metric
There are no metric cups. A cup is no SI unit.
liter
A quart is a measure of volume, not weight. A liter would be the metric equivalent of a quart in terms of volume. If it's weight you're looking for, the basic unit of mass in the metric system is the gram.
Capacity isn't a unit it is just a term that means how much a container holds. You can have metric units of capacity, such as Litres and Millilitres.
You would use the metric unit "liters" to measure the capacity of a hot water tank.
liter