One tablespoon of water weighs 14.8 g (poured, USDA). Water is the reference liquid for all volume-to-weight conversion: one US cup is 236.6 ml, and a millilitre of water weighs exactly 1 g, so a tablespoon — which is 14.79 ml — weighs 14.8 g. That simple relationship is why water's tablespoon weight is the baseline against which every other liquid is compared: milk is slightly heavier, oil is lighter, honey is much heavier. The figure matters whenever you are converting a recipe between volume and weight, calibrating a scale, or working out how much liquid a recipe actually contains. All weights on this page are approximate only in the sense that temperature changes water's density slightly; at room temperature, 14.8 g is exact for practical purposes.
How much does 1 tablespoon of water weigh?
One level tablespoon of water weighs 14.8 g, poured, according to USDA. That is the headline number, but a single tablespoon is rarely the whole story — most recipes use several spoonfuls, or a fraction of a cup, so the table below gives the weights you will actually reach for, from a teaspoon up to a full cup. Every figure is derived from the same source value of 237 g per cup, so the whole table is consistent. Treat all of these as approximate: poured is a technique, not a machine setting, and two cooks measuring the same ingredient can differ by a gram or two per spoonful. When the recipe matters, weigh the ingredient on a kitchen scale instead.
| Amount | Weight (approx.) |
| --- | --- |
| 1 teaspoon | 4.9 g |
| 1 tablespoon | 14.8 g |
| 2 tablespoons | 29.6 g |
| 3 tablespoons | 44.4 g |
| 1/4 cup (4 tbsp) | 59.2 g |
| 1/2 cup (8 tbsp) | 118.5 g |
| 3/4 cup (12 tbsp) | 177.8 g |
| 1 cup (16 tbsp) | 237 g |
A useful rule of thumb: there are 3 teaspoons in a tablespoon and 16 tablespoons in a cup, so you can move between any of these measures by multiplying or dividing. If a recipe calls for 2 teaspoons and you only have a tablespoon measure, that is two-thirds of a tablespoon — about 9.9 g. If a recipe calls for a quarter cup and you only have a tablespoon, that is 4 level tablespoons. Keep the tablespoons to grams converter open while you cook and you will never need to do the arithmetic in your head.
Worked examples
Adjusting a bread dough
A bread dough uses 2 tablespoons of water — about 30 g — to adjust the hydration after the flour is mixed in. The weight matters because bread dough is a ratio of flour to water, and a tablespoon of water in a dough made with 500 g of flour changes the hydration by 6 percent, which is enough to notice in the handling. Adding water by the tablespoon lets you bring a dry dough together gradually, and weighing the water tells you exactly how much you added, so you can reproduce the same dough next time. Professional bakers measure all their water by weight for this reason — a tablespoon is 14.8 g, and a dough that needs 350 g of water gets 350 g, not a jugful guessed by eye.
A small batch of simple syrup
A cocktail simple syrup uses 4 tablespoons of water — about 59 g — dissolved with 4 tablespoons of sugar. The weight matters because simple syrup is a 1:1 ratio by weight, and 59 g of water to 50 g of sugar is close enough to 1:1 for a syrup that dissolves cleanly and keeps well. Measuring the water by weight also lets you scale the syrup: a double batch needs 118 g of water, and a half batch needs 30 g. The syrup is heated just until the sugar dissolves, then cooled and bottled — and because the ratio was measured by weight, the syrup has the same sweetness and the same shelf life every time.
Blooming gelatin for a panna cotta
A panna cotta uses 3 tablespoons of cold water — about 44 g — to bloom a sheet of gelatin before it is melted into the cream. The weight matters because gelatin needs just enough water to soften without diluting the dessert: too much water and the panna cotta sets too softly, too little and the gelatin never fully hydrates and the dessert turns grainy. Weighing 44 g of water into a small bowl, sprinkling the gelatin over it, and waiting 5 minutes gives a perfectly bloomed gelatin every time. The same principle applies to any recipe that blooms gelatin or hydrates yeast — the water amount is small, so the tablespoon weight is the practical measure.
How to measure a tablespoon of water correctly
Water is measured poured, and it is the easiest liquid to measure accurately because it has no viscosity to speak of — it flows cleanly, levels itself, and leaves almost nothing behind on the spoon. Pour it into the tablespoon measure and let it settle to the brim, or weigh it directly into the bowl, which is the method professional bakers use for any recipe where water matters. The USDA figure of 14.8 g per tablespoon is based on water at room temperature; hot water is very slightly lighter, at about 14.6 g per tablespoon, and cold water very slightly heavier, but the difference is too small to matter in cooking. One US cup of water is 236.6 ml and weighs 237 g, and one tablespoon is exactly one sixteenth of a cup, which is how the 14.8 g figure is derived. If you are calibrating a kitchen scale, a tablespoon of water should read 14.8 g — it is the simplest accuracy check you can do.
When the weight matters most
Water's tablespoon weight matters most as the baseline for everything else. Every other liquid's density is understood in relation to water: milk at 15.3 g per tablespoon is slightly denser, oil at 13.6 g is lighter, honey at 21 g is far denser. Knowing water's weight lets you estimate any liquid's weight and, more importantly, lets you convert recipes between volume and weight with confidence. It also matters in baking, where water is the ingredient that hydrates flour and activates yeast, and where the difference between 300 g and 330 g of water in a dough is the difference between a firm loaf and a slack one. And it matters for scaling: a recipe that calls for 2 cups of water needs 474 g, and a recipe that calls for 2 tablespoons needs 29.6 g. Water is the one ingredient where volume and weight are interchangeable, and that is what makes it the reference point for the whole conversion system.
Common mistakes to avoid
The most common mistake is assuming all liquids weigh the same as water. Oil weighs about 10 percent less per tablespoon, honey about 40 percent more, and molasses about 43 percent more — so a recipe converted by treating every liquid as water will be wrong. The second mistake is measuring water in a dry measuring cup instead of a liquid jug or a scale, which is inaccurate for any liquid. The third mistake is forgetting that a tablespoon is 14.79 ml, not 15 ml: the difference is tiny for one tablespoon, but across a recipe that uses 16 tablespoons it adds up to about 3 g. Finally, do not use water's weight to estimate the weight of a mixed liquid — a sauce that is half water and half oil weighs somewhere between the two, and the only reliable method is to weigh the finished sauce itself.
A note on the published figures
One US cup is 236.6 ml, so water weighs 237 g. King Arthur rounds water to 227 g; we use the exact 237 g. The figure used on this page — 237 g per cup, 14.8 g per tablespoon — is the USDA value, and it is the one the site's converters use, so the numbers here and the numbers in the tool always agree. If another source gives you a different figure, the difference is almost always the measuring method, not an error: a scooped cup weighs more than a spooned cup, and a packed spoonful weighs more than a level one.
Frequently asked questions
How many grams is 1 tablespoon of water?
One tablespoon of water weighs 14.8 g, poured, according to the USDA. One teaspoon weighs about 4.9 g. At room temperature this is effectively exact — 1 ml of water weighs 1 g, and a tablespoon is 14.79 ml.
How many tablespoons of water are in 100 g?
There are about 7 tablespoons in 100 g of water (100 divided by 14.8 is 6.8). A standard 1 litre bottle of water weighs 1,000 g and holds about 68 tablespoons.
Is a tablespoon of water the same as a tablespoon of milk?
Almost, but not exactly. A tablespoon of water weighs 14.8 g, while a tablespoon of milk weighs 15.3 g — milk is slightly denser because of its dissolved solids and fat. The difference is small enough to ignore in most recipes, but it matters in baking where precision counts.
Why does oil weigh less than water per tablespoon?
Because oil is less dense than water — about 0.92 g per ml against water's 1 g per ml. A tablespoon of vegetable oil weighs 13.6 g against water's 14.8 g. That density difference is also why oil floats on water.
Can I use water to check my kitchen scale?
Yes. A tablespoon of water should weigh 14.8 g, and a cup should weigh 237 g. If your scale reads significantly differently, it needs calibrating. Use room-temperature water and a container you have tared first.
Related conversions
If you cook with this ingredient regularly, these pages will help: the tablespoons to grams converter for any amount, the cups to grams converter for larger quantities, and the full ingredient guide for storage, substitutes and the weight of a whole cup. You can also compare the cup weight on the Water cups to grams page or work backwards from a gram amount on the Water grams to cups page.
You may also want Milk tbsp to grams, Water ingredients, Water cups to grams and Water grams to cups.