Por que a distinção importa
US tablespoon 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.
Exemplo
1 US tbsp = 0.000522189670139 ft³ · 10 US tbsp = 0.00522189670139 ft³.
0.000522189670139 ft³