Quarts to litres conversion tables - Cooking Index
US quarts are categorized as liquid quarts (for liquids) and dry quarts (for all non liquid/dry goods).
A US liquid quart is equal to two American pints or 946 millilitres (0.946 litre).
So:
2 US liquid quarts = 1.892 litres
3 US liquid quarts = 2.838 litres
4 US liquid quarts = 3.784 litres
5 US liquid quarts = 4.73 litres
10 US liquid quarts = 9.46 litres
20 US liquid quarts = 18.92 litres
A US dry quart is equal to 1.101 litres of dry goods.
A UK quart is equal to 1.136 litres.