0.9 Tablespoon to Teaspoon
0.9 tbsp = 2.7 tsp
= 13.3 ml | 0.45 fl oz | 0.0563 cups
Closest practical measure: 2 tsp + 1/2 tsp + 1/4 tsp (a little less)
Australia: 0.9 tbsp = 3.6 tsp (20 ml tablespoon)
Nine-tenths of a tablespoon is 2.7 teaspoons or 13.3 ml. This is just under a full tablespoon (1 US tbsp = 14.79 ml). For practical purposes, 1 tablespoon is a close enough substitute outside of precision baking. The 0.3 teaspoon (1.5 ml) shortfall is hard to gauge consistently with standard spoons. Decimal-tablespoon values like 0.9 usually come from scaled-from-grams recipes. To measure exactly, fill a tablespoon to slightly under the rim, or measure 2 teaspoons + 1/2 teaspoon + 1/4 teaspoon (= 2.75 tsp, close enough). In Australia, 0.9 of a 20 ml tablespoon is 3.6 metric teaspoons (18 ml).