Tablespoon to Milliliters - How Many ml in a Tbsp?

What exactly is a tablespoon?

A tablespoon (tbsp) is a unit of volume used in cooking. The US tablespoon holds exactly 14.7868 ml, which rounds to 15 ml. That 15 ml value is also the standard in most metric countries that define a tablespoon. The abbreviation is "tbsp" or "T" (capital T, to distinguish from teaspoon "t" or "tsp").

The tablespoon bridges the gap between teaspoons and cups. Three teaspoons make one tablespoon. Sixteen tablespoons make one cup. Two tablespoons make one fluid ounce. These ratios are the backbone of American recipe measurements.

US vs. UK vs. Australian tablespoon

The US tablespoon holds 14.79 ml (rounded to 15 ml). The UK tablespoon also holds 15 ml in modern usage. The Australian tablespoon is the outlier: it holds 20 ml. That is a full third more than the US tablespoon.

This difference matters most in baking. If an Australian recipe calls for 3 tablespoons of sugar, that is 60 ml. With a US tablespoon, 3 tablespoons would only be 45 ml. You would end up with 25% less sugar. Always check the origin of the recipe. Australian recipes often state "1 tablespoon = 20 ml" at the top.

How many teaspoons in a tablespoon?

One tablespoon equals exactly 3 teaspoons. This is true for US, UK and metric tablespoons alike. It is the single most useful conversion to memorize. When a recipe says "1/2 tablespoon," that is 1.5 teaspoons. When it says "1/4 tablespoon," use 3/4 teaspoon.

Why does this matter? Many spice measurements are in fractions of a tablespoon. "Half a tablespoon of cinnamon" is easier to measure as 1.5 teaspoons. Your teaspoon set (1 tsp, 1/2 tsp, 1/4 tsp) handles these amounts more precisely than eyeballing half a tablespoon.

Common recipe amounts in tablespoons

Tablespoons appear constantly in American recipes. Butter is often measured in tablespoons: one stick of US butter is 8 tablespoons (120 ml, 113 g). Olive oil for a salad dressing: 3 tablespoons (45 ml). Vanilla extract: 1 tablespoon (15 ml). Lemon juice: 2 tablespoons (30 ml, the juice of about one lemon).

For dry ingredients, a level tablespoon is the standard. Fill the spoon and sweep the top flat with a knife. A heaped tablespoon holds roughly twice as much, but recipes never assume heaped unless they say so. In British recipes, "a dessertspoon" is about 10 ml - between a teaspoon and a tablespoon.

Tablespoons and medicine dosing

Older medicine instructions sometimes say "take one tablespoon." Pharmacists discourage this because household spoons vary in size. A kitchen tablespoon might hold anywhere from 10 to 20 ml. For medicine, always use the dosing cup or syringe provided with the product. The correct dose for "one tablespoon" of medicine is exactly 15 ml.

Children's medicines are often dosed in teaspoons (5 ml) or half-teaspoons (2.5 ml). Never substitute a tablespoon for a teaspoon dose - you would give three times the intended amount. This is a genuine safety concern, not just a cooking inconvenience.