How to convert US customary teaspoons to metric tablespoons (15 mL)
tbsp (metric) = tsp (US) × 0.328594772916667
Multiply the tsp (US) reading by 0.328594772916667.
Worked examples
1 tsp (US) ≈ 0.3285947729 tbsp (metric)
1 × 0.328594772916667 ≈ 0.3285947729
3 tsp (US) ≈ 0.9857843187 tbsp (metric)
3 × 0.328594772916667 ≈ 0.9857843187
Frequently asked questions
Which recipe measure should I select?
A metric cup is 250 mL, while a US customary cup is 236.5882365 mL. Metric teaspoons and tablespoons here are 5 mL and 15 mL; US customary spoons differ. Match the named definition in the recipe.
US customary teaspoons to metric tablespoons (15 mL) table
Fixed reference · US customary teaspoon to Metric tablespoon (15 mL)
Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.
US customary teaspoon (tsp (US))
Metric tablespoon (15 mL) (tbsp (metric))
0
0
0.1
0.03285947729
0.5
0.1642973865
1
0.3285947729
2
0.6571895458
5
1.642973865
10
3.285947729
25
8.214869323
50
16.42973865
100
32.85947729
1000
328.5947729
Table results use 10 significant figures; decimal formula coefficients use up to 15. Calculations use the unit definitions before rounding. Extra digits do not improve measurement accuracy.