2/3 Tablespoon to Teaspoon
2/3 tbsp = 2 tsp
= 9.9 ml | 0.333 fl oz | 0.0417 cups
Australia: 2/3 tbsp = 2.67 tsp (20 ml tablespoon)
2/3 of a tablespoon is exactly 2 teaspoons (9.9 ml), one of the cleanest conversions in the kitchen. A tablespoon holds 3 level teaspoons, so two-thirds of it is 3 × 2/3 = 2 tsp with nothing to add or shave off: fill a level teaspoon twice. Two-thirds of a UK tablespoon works out to 10 ml, which is exactly one UK dessert spoon, so a recipe calling for 2/3 tablespoon can be measured with a dessert spoon. The decimal 0.67 tbsp a recipe scaler prints is the same amount.
Two-thirds of a tablespoon equals exactly 2 teaspoons (9.86 ml). This is one of the cleanest fractional conversions because the 3:1 ratio of teaspoon-to-tablespoon makes 2/3 tbsp = 2 tsp by direct simplification. To measure it, fill a teaspoon twice (= 2 tsp). It appears in recipes that have been scaled from a 3x batch where a single tablespoon was originally specified. In Australia, 2/3 of a 20 ml tablespoon is 13.3 ml (= 2.67 metric teaspoons).