There are 14.786764782056 milliliter in a tablespoon. 1 Tablespoon is equal to 14.786764782056 Milliliter. 1 tbsp = 14.786764782056 mL. A tablespoon is a non-scientific but very widely used unit of volume, which works very well in cooking, herbal medicine, etc. It is represented by a capacity of one tablespoon which varies from roughly 15 mL in the US to 20 mL in Australia.