And is a tablespoon a heaped spoon or whatNo it's a tablespoon. Is a centiliter a heaped milliliter?
A US tablespoon is 0.5 US fluid ounces which is 14.8 ml.
You can round up to 15 ml if that makes life easier for you.
But, that would make a stick of butter is 120ml which you know is not true.