1 teaspoon of tomato sauce weighs 5.10 g. A teaspoon is one forty-eighth of a cup, and a cup of tomato sauce is 245 g spooned and levelled, so the maths is 245 ÷ 48 = 5.10 g. The same cup divided by 16 gives the tablespoon weight of 15.3 g, and there are 3 teaspoons in every tablespoon. If you cook from recipes written in cups and spoons, this page is the bridge between the two, and the worked examples show the conversion inside real dishes rather than in isolation.
Tomato sauce by the teaspoon is a measure for the small jobs: a spoonful in a soup, a spoonful on a single pizza base, or a spoonful in a braise where the sauce is a background note rather than the main event. A teaspoon holds 5.1 g, and a cup is 245 g — tomato sauce is a smooth, cooked sauce, a little heavier than water per spoon because the tomato solids add mass. The spoon table is the fastest way to scale a sauce down to one serving without opening a whole jar.
All figures on this page are approximate, and they come from USDA, measured spooned and levelled. When a recipe has to work the first time, verify with a kitchen scale.
Conversion table
One teaspoon is one forty-eighth of a cup, so every figure in this table is the cup weight divided by 48, rounded to two decimal places. All figures are approximate; verify with a kitchen scale when it matters.
| Teaspoons | Grams (approx.) |
|---|---|
| 1 tsp | 5.10 g |
| 2 tsp | 10.21 g |
| 3 tsp | 15.31 g |
| 4 tsp | 20.42 g |
| 5 tsp | 25.52 g |
| 6 tsp | 30.62 g |
| 7 tsp | 35.73 g |
| 8 tsp | 40.83 g |
| 9 tsp | 45.94 g |
| 10 tsp | 51.04 g |
| 11 tsp | 56.15 g |
| 12 tsp | 61.25 g |
The tablespoon figures are included too, because most recipes switch between teaspoons and tablespoons, and 3 teaspoons make 1 tablespoon.
| Tablespoons | Grams (approx.) |
|---|---|
| 1 tbsp | 15.3 g |
| 2 tbsp | 30.6 g |
| 3 tbsp | 45.9 g |
| 4 tbsp | 61.2 g |
| 5 tbsp | 76.6 g |
| 6 tbsp | 91.9 g |
| 7 tbsp | 107.2 g |
| 8 tbsp | 122.5 g |
| 9 tbsp | 137.8 g |
| 10 tbsp | 153.1 g |
| 11 tbsp | 168.4 g |
| 12 tbsp | 183.8 g |
| 13 tbsp | 199.1 g |
| 14 tbsp | 214.4 g |
| 15 tbsp | 229.7 g |
| 16 tbsp | 245.0 g |
One tablespoon is one sixteenth of a cup, so every tablespoon figure is the cup weight divided by 16, rounded to one decimal place.
Cups to grams for reference
When a recipe jumps from spoons to cups, use this table instead of counting out 16 tablespoons. Every figure is the cup weight multiplied by the fraction, rounded to one decimal place, and all figures are approximate.
| Cups | Grams (approx.) |
|---|---|
| 1/4 cup | 61.2 g |
| 1/3 cup | 81.7 g |
| 1/2 cup | 122.5 g |
| 2/3 cup | 163.3 g |
| 3/4 cup | 183.8 g |
| 1 cup | 245.0 g |
One cup of tomato sauce weighs 245 g, so a quarter cup is 61.2 g and half a cup is 122.5 g. Those two figures cover most everyday scaling, and the full table above covers the rest.
How the measurement works
The figure on this page comes from USDA, measured spooned and levelled. Smooth, cooked tomato sauce, lightly seasoned. Pasta, pizza, braising and soups.
All results on this page are approximate. Ingredient weights vary with brand, humidity, temperature and how firmly you pack the spoon, so when a recipe has to work the first time, weigh the ingredient on a kitchen scale and use the numbers here as a guide. The method matters more than the number itself, because the same spoon of tomato sauce measured two different ways can give two different weights, and the USDA value assumes the spooned and levelled method every time.
Worked examples
A sauce for a single pizza
A single pizza base takes 6 teaspoons (30.62 g) of tomato sauce spread thinly to the edges, and the spoon measure keeps the base crisp instead of soggy. Spread it with the back of the spoon in a thin, even layer — too much sauce and the base steams instead of baking, too little and the pizza is dry.
A spoonful in a soup
A soup for two takes 4 teaspoons (20.42 g) of tomato sauce stirred in to deepen the flavour, and the spoon measure keeps the soup balanced — tomato sauce adds acidity as well as flavour, and too much makes the soup sharp. Add it early so the acidity mellows as the soup simmers.
A braise for one
A braise for one chicken thigh takes 8 teaspoons (40.83 g) of tomato sauce as its cooking liquid, with a splash of stock, and the spoon measure keeps the braise from turning into a soup. Cover the pan and cook it low and slow, or the sauce reduces too far and catches.
Practical guidance
Spoon tomato sauce in level and do not shake the spoon: it is a smooth sauce that holds its shape well enough for a level spoon to be accurate. Tomato sauce and passata weigh almost the same per spoon, so the figures hold for both — but passata is uncooked and thinner, so a recipe written for tomato sauce needs a little longer cooking if you swap in passata. Tinned tomato sauce and jarred sauce also weigh the same per spoon; the difference is seasoning, not density.
Tomato sauce is acidic, which is the practical point that matters most: it reacts with unlined aluminium and cast iron, and it can taste metallic if it is cooked in the wrong pan. Use stainless steel or enamel for a tomato sauce, and do not store leftover sauce in an opened tin — transfer it to a jar or a container, or the tin will taint the sauce. Refrigerate an opened jar and use it within a week.
Scaling with spoons is easy once you know the weight of one spoon. To measure 100 g of tomato sauce, count out about 19.6 teaspoons, and for 50 g, about 9.8 teaspoons. Halving a recipe that calls for 4 teaspoons means using 2 teaspoons, or 10.21 g, and doubling it means 8 teaspoons, or 40.83 g. The key is to scale every ingredient by the same factor, because changing one ingredient without changing the others throws the recipe out of balance. For large amounts, switch to a cup measure or a scale, since counting out teaspoons one by one is slow and error-prone, and a cup is faster and more accurate.
When should you weigh tomato sauce instead of measuring it? Whenever the recipe has to work the first time, and whenever the amount is large. A kitchen scale costs less than a single failed bake, and it removes the biggest source of variation in home cooking, which is the way ingredients pack into a cup or a spoon. Put the bowl on the scale, press tare, and add the tomato sauce until the display shows the number you need. There is nothing to wash afterwards except the bowl, and the result is the same every time. For small amounts, a level spoon is accurate enough, and for anything where precision matters, the scale is the tool to reach for.
Storage. Refrigerate after opening; use within 1 week.
- Level every spoon with the back of a knife.
- Use spoons for small amounts, and a scale for large ones.
- Keep the same spoon for the whole recipe so errors stay consistent.
Frequently asked questions
How many grams is 1 teaspoon of tomato sauce?
One level teaspoon of tomato sauce weighs approximately 5.10 g. That figure comes from dividing the cup weight of 245 g by 48, and it assumes the ingredient is measured spooned and levelled. All figures on this page are approximate, so verify with a kitchen scale when it matters.
Is tomato sauce the same as passata?
Almost, but not quite. Passata is uncooked, sieved tomatoes; tomato sauce is cooked and usually seasoned. They weigh almost the same per teaspoon, about 5.1 g, so the figures hold for both — but a recipe written for tomato sauce needs a little longer cooking if you swap in passata, because passata is raw.
Can I use tomato sauce instead of tomato paste?
In a cooked sauce, yes, but you need much more of it. Tomato paste is concentrated — a teaspoon weighs 5.46 g and carries far more tomato flavour than a teaspoon of sauce at 5.1 g. As a rough guide, use three times as much tomato sauce as tomato paste, and cook it down longer.
Why does tomato sauce taste metallic sometimes?
Because it is acidic and reacts with unlined aluminium and cast iron. Cook tomato sauce in stainless steel or enamel, and do not store leftover sauce in an opened tin — transfer it to a jar, or the tin will taint the sauce.
How many teaspoons of tomato sauce are in a tablespoon?
There are 3 teaspoons in 1 tablespoon, so 1 tablespoon of tomato sauce weighs approximately 15.3 g, which is three times the teaspoon weight of 5.10 g. Use the tablespoon table on this page when a recipe switches between the two units.
How should I store tomato sauce?
Refrigerate after opening; use within 1 week. Keeping it stored properly also keeps its weight consistent, since an ingredient that has absorbed moisture or dried out will not weigh the same per spoon as a fresh one.