If you are mid-recipe and need this number fast: 1 tablespoon is 3 teaspoons. That is the answer, and the rest of this page is the table, the worked examples and the pitfalls for when you have more time. The conversion is exact, because both units are defined volumes in the same system — unlike a cup of flour, which changes weight with the ingredient, a tablespoon is always the same volume, so the factor never varies.
Most people meet this conversion when a recipe is written in one system and their tools are marked in the other. American recipes use tablespoons; metric recipes use teaspoons; and a cook who follows recipes from both ends up converting constantly. The good news is that volume-to-volume conversions are the simplest kind: the factor is exact, it never depends on the ingredient, and it works the same way for water, milk, oil, stock and every other liquid you cook with.
Conversion table
| Tablespoons | Teaspoons |
|---|---|
| 1 tablespoon | 3 teaspoons |
| 2 tablespoons | 6 teaspoons |
| 3 tablespoons | 9 teaspoons |
| 4 tablespoons | 12 teaspoons |
| 6 tablespoons | 18 teaspoons |
| 8 tablespoons | 24 teaspoons |
| 12 tablespoons | 36 teaspoons |
| 16 tablespoons | 48 teaspoons |
Read the table in either direction. Going from tablespoons to teaspoons, multiply by 3; going back, divide by 3 or multiply by 0.3333. The middle rows are the ones recipes use most — 4 tablespoons is 12 teaspoons, and 8 tablespoons is 24 teaspoons. If your amount is not in the table, multiply it by 3 and you have the answer. For a quick check: 1 tablespoon is 3 teaspoons, 2 tablespoons are 6 teaspoons, and 10 tablespoons are 30 teaspoons.
Worked examples
Measuring without the right cup. Your tablespoon measure is in the dishwasher and you only have a teaspoon measure. 3 tablespoons is 9 teaspoons, so count out 9 level teaspoons and you are done. It is slower than using the right measure, but it is exact — this is a fixed unit conversion, not an estimate. The only thing to watch is levelling: a heaped teaspoon is not a teaspoon, and three heaped spoonfuls can add a whole extra tablespoon to a delicate batter.
A dressing or sauce, made to taste. A salsa verde comes together in the bowl: 3 tablespoons of oil, then the same again of vinegar, then seasoning. In teaspoons that first pour is 9 teaspoons. Dressings are forgiving — a little more or less oil will not ruin them — but knowing the conversion means you can scale the dressing up for a party without guessing, and you can write the scaled version down so it tastes the same next time.
A large pot of stock or soup. A stock pot takes 12 tablespoons of water, which is 36 teaspoons. At this size the jug is the only sensible tool — counting it out in tablespoons would take all afternoon. Fill the jug to the 36 teaspoons line, pour, and repeat if the pot needs more. And remember that stock reduces as it simmers, so measure the water going in, not the stock coming out.
How the conversion works
The US tablespoon is defined as 14.7868 ml, and the teaspoon is defined as 4.9289 ml. Divide the first by the second and you get 3 — that is the whole derivation, and it is why the conversion is exact rather than approximate. No kitchen experiment was needed to establish it; the units were defined this way, so the ratio follows from the definitions. That is also why the same factor appears in every reliable conversion chart: there is only one right answer, and every source that uses US customary units agrees on it.
The one thing to check is which tablespoon your recipe means. This page uses the US customary tablespoon throughout. A metric cup is 250 ml, an imperial cup is 284 ml, and older recipes sometimes use a 'cup' that means whatever cup the writer had in the cupboard. If a recipe from outside the US gives an amount that looks wrong after converting — a cake with far too much liquid, a soup that is far too thin — the cup is the first suspect. Convert the recipe to grams once, write the grams on the recipe card, and the question never comes up again.
Rounding deserves a note too. The exact factor is 3 to four decimal places, and the full value runs further (14.79 ml divided by 4.93 ml). For everyday cooking, rounding to two or three significant figures is fine: a 1% rounding error is invisible in a soup and barely noticeable in a cake. But round only at the end. If you round the factor and then multiply by a large amount, the rounding error grows with the amount — so keep the full factor through the calculation and round the answer, not the factor.
Volume is not weight
A conversion between two volume units is the same for every ingredient, but a conversion between volume and weight is not — and confusing the two is the most common conversion mistake in cooking. A cup of all-purpose flour weighs about 120 g spooned and levelled (King Arthur Baking), a cup of granulated sugar about 198 g, a cup of butter about 227 g, a cup of milk about 244 g (USDA), and a cup of honey about 336 g. All of those weights are approximate, because they depend on how the ingredient is measured: flour is spooned and levelled, brown sugar is packed at about 213 g a cup, and honey is poured.
Flour weight is the most disputed conversion in baking. King Arthur Baking lists 120 g per cup spooned and levelled, while other sources quote 125 g, 130 g and up to 142 g for a scooped cup. We use the King Arthur spooned-and-levelled value as primary, and the gap is a warning: if you scoop flour instead of spooning and levelling it, you can add 20 g or more per cup, which is enough to make a cake dry. Granulated sugar carries a smaller dispute — King Arthur lists 198 g per cup and the USDA rounds it to 200 g, a difference of rounding rather than a real disagreement. When a recipe matters, verify with a kitchen scale: weigh the ingredient instead of measuring it by volume, and every dispute on this page disappears.
Cooking with metric recipes
Most of the world cooks in millilitres and litres, and most American recipes cook in cups and spoons, so sooner or later every cook has to cross between the two systems. The way to do it is to convert the whole recipe to one system before you start, not ingredient by ingredient as you go. Pick the system your tools match — if your jug is marked in millilitres, convert everything to millilitres; if your cups are marked in cups, convert everything to cups — and write the converted amounts on the recipe. Round sensibly: 236.59 ml becomes 240 ml in practice, and 14.79 ml becomes 15 ml, because a 1% rounding is invisible in a soup and barely visible in a cake. But do not round the small things: a teaspoon of baking powder rounded up by 20% is a real error. If a recipe gives grams as well as millilitres, use the grams — weight is the same in every country, and a scale ends the whole argument about cups. After a few converted recipes, the common equivalents become familiar, and the crossing gets faster.
Frequently asked questions
What is 4 tablespoons in teaspoons?
12 teaspoons. Multiply 4 by 3: 4 × 3 = 12. This is a common recipe amount — a third of a cup of cream, a few spoonfuls of oil — so it is worth knowing it is a straight multiplication with no special case.
Is a US tablespoon the same as a metric or imperial tablespoon?
Not always, and this is the biggest trap in unit conversion. This page uses the US tablespoon (14.7868 ml). A metric cup is 250 ml, an imperial cup is 284 ml, a US pint is 473 ml while an imperial pint is 568 ml, and an Australian tablespoon is 20 ml against the US 14.79 ml. If your recipe comes from outside the US, check which system it uses before converting — the factor on this page is correct for US measures only.
Can I use a kitchen scale instead of converting?
For liquids, often yes. A kitchen scale removes volume conversion entirely if the recipe gives grams, and for water-based liquids 1 ml weighs about 1 g, so millilitres and grams are nearly interchangeable. But the shortcut fails for fats and syrups: a cup of olive oil weighs about 216 g, not 237 g, and a cup of honey about 336 g. Use the scale when the recipe gives weights, and use this conversion when the recipe gives volumes.
Does temperature change the conversion?
No, not in any way that matters in a kitchen. Liquids expand slightly when heated, so a cup of boiling stock is a fraction of a percent larger in volume than a cup of cold stock, but the difference is far smaller than ordinary measuring error. Measure liquids at room temperature where you can, and never worry about temperature when converting between volume units.
How many tablespoons are in 1 teaspoon?
0.3333 tablespoon — the reverse of the main conversion. Divide the number of teaspoons by 3, or multiply by 0.3333. For example, 1.3333 tablespoons is 4 teaspoons. Use the reverse direction when a metric recipe gives you teaspoons and your cups are in tablespoons.