Por que a distinção importa
US liquid quart and Imperial gallon 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 US qt = 0.208168546157 imp gal · 10 US qt = 2.08168546157 imp gal.
0.208168546157 imp gal