Pourquoi la distinction compte
US teaspoon and cubic inch 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.
Exemple
1 US tsp = 0.30078125 in³ · 10 US tsp = 3.0078125 in³.
0.30078125 in³