Por que a distinção importa
Imperial quart and US liquid quart belong to measurement conventions that may look familiar but are not always equivalent across countries. Mendeleev.com therefore keeps the system name next to the abbreviation and calculates from defined conversion factors rather than rounded kitchen rules.
Exemplo
1 imp qt = 1.2009499255 US qt · 10 imp qt = 12.009499255 US qt.
1.2009499255 US qt