Por qué importa la distinción
US liquid gallon and cubic foot 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.
Ejemplo
1 US gal = 0.133680555556 ft³ · 10 US gal = 1.33680555556 ft³.
0.133680555556 ft³