How Many Teaspoons in a Tablespoon?

The 3-to-1 rule

The core fact is simple: 1 tablespoon equals 3 teaspoons. That means 2 tablespoons is 6 teaspoons, and half a tablespoon is 1.5 teaspoons. This ratio is the same whether you measure in US customary units or in metric spoons, because both systems keep the tablespoon three times the teaspoon.

This is handy when a measuring spoon goes missing. Lost your tablespoon? Use 3 teaspoons instead. Need a quarter tablespoon? That is three-quarters of a teaspoon. The rule turns any tablespoon amount into an equal number of teaspoons by multiplying by three.

US, UK, and metric spoon sizes

In the US, a teaspoon is 4.93 mL and a tablespoon 14.79 mL, though most cooks treat them as 5 mL and 15 mL. The metric spoon standard is exactly 5 mL and 15 mL. UK measuring spoons follow the metric standard too, so a UK tablespoon is 15 mL, the same as a US one for practical purposes.

The odd one out is Australia, where the standard tablespoon is 20 mL — four teaspoons rather than three. If you follow an Australian recipe with an American tablespoon, add a little extra; if you use an Australian tablespoon for a US recipe, you will overshoot. When precision matters, the difference of a few milliliters can matter for baking and seasoning.

Level vs heaping spoons

The 3-to-1 rule assumes level spoons — filled and swept flat across the top. A heaping tablespoon of flour or sugar can hold 50% more than a level one, which throws off the conversion. For dry ingredients, spoon into the measure and level with a straight edge rather than scooping and packing.

For liquids, a level spoon is easy: fill to the brim without overflowing. For sticky ingredients like honey or peanut butter, a light coat of oil helps them slide out cleanly so your measurement stays true. When in doubt, a converter that shows both spoon volumes and milliliters removes the guesswork.

Frequently asked questions

How many teaspoons are in a tablespoon?

Exactly 3 teaspoons make 1 tablespoon in both the US and metric systems.

How many milliliters is a tablespoon?

A US tablespoon is 14.79 mL; the metric standard rounds to 15 mL. Australia uses 20 mL.

How many teaspoons in half a tablespoon?

Half a tablespoon is 1.5 teaspoons — one and a half level teaspoons.

Is a UK tablespoon the same as a US one?

Practically yes: the UK measuring tablespoon is 15 mL, essentially the same as the US 14.79 mL.