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Tablespoons to Teaspoons Converter

Convert tablespoons into teaspoons with US, metric / UK, and Australian spoon conventions, plus millilitre and cup equivalents.

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Tablespoons to teaspoons converter: compare US, metric, and Australian spoon measures

Convert tablespoons into teaspoons with regional spoon-size differences shown clearly. This calculator compares US, metric / UK, and Australian tablespoons, then adds millilitre, cup, and fluid-ounce equivalents so you can match the recipe source you are using.

How the tablespoons-to-teaspoons conversion works

The conversion depends on the tablespoon convention. A metric / UK tablespoon is 15 ml and equals exactly 3 teaspoons. A US tablespoon is slightly smaller at 14.7868 ml, so it equals about 2.957 teaspoons. An Australian tablespoon is 20 ml and equals 4 teaspoons.

This tool multiplies the number of tablespoons by the teaspoon equivalent for the selected convention, then also shows the total millilitres and the rough cup and fluid-ounce equivalents for the same volume.

Teaspoons = Tablespoons × Teaspoons per tablespoon

The multiplier is about 2.957 for US tablespoons, 3 for metric / UK, and 4 for Australian.

Millilitres = Tablespoons × Tablespoon size (ml)

This makes it easier to compare spoon-based recipes against metric measuring jugs and scales.

Why spoon conventions create confusion

Many cooks assume every tablespoon equals 3 teaspoons, but that only holds exactly for 15 ml metric tablespoons. US tablespoons are a little smaller, while Australian tablespoons are substantially larger.

That difference matters when you scale sauces, spice blends, baking powder, syrup, or any other measurement where a small change can alter taste or texture.

Best use cases for this converter

Use this tool when you are converting a spoon-based recipe from one measuring system to another, checking how a regional cookbook standard maps to your spoons, or translating tablespoons into a smaller teaspoon measure for more precise kitchen work.

If you are converting ingredient weight rather than liquid or volume measure, switch to an ingredient-density calculator instead. Spoon relationships alone cannot tell you how many grams a tablespoon of flour or honey weighs.

Further reading

Frequently asked questions

How many teaspoons are in 1 tablespoon?

It depends on the convention. A metric / UK tablespoon equals exactly 3 teaspoons, a US tablespoon equals about 2.957 teaspoons, and an Australian tablespoon equals 4 teaspoons.

 Why does an Australian tablespoon equal 4 teaspoons?

Because the Australian tablespoon is defined as 20 ml. If the teaspoon remains 5 ml, then 20 ml divided by 5 ml gives 4 teaspoons.

 Can I assume every recipe tablespoon equals 3 teaspoons?

Only if the recipe is using the 15 ml metric tablespoon convention. US recipes are close but not exact, and Australian recipes are meaningfully different, so match the spoon system to the recipe source before converting.

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