Почему различие важно
Imperial gallon 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.
Пример
1 imp gal = 4.80379970202 US qt · 10 imp gal = 48.0379970202 US qt.
4.80379970202 US qt