A 4.5 oz tube of tomato paste holds about 0.5 cups. Tomato paste weighs about 262 g per cup, so 128 g divides to half a cup — eight tablespoons. Half a cup is a small amount, but tomato paste is used a tablespoon at a time, so a single tube covers four or five recipes. The tube is the practical size: a tin of paste, once opened, must be used within days, while a tube keeps for months in the fridge.
How many cups in a 4.5 oz tube?
A 4.5 oz tube of tomato paste holds about 0.5 cups (128 g ÷ 262 g per cup).
| Amount | Cups | Grams | Tablespoons |
|---|---|---|---|
| Full 4.5 oz tube | 0.5 | 128 | 8 |
| Half 4.5 oz tube | 0.25 | 64 | 4 |
| Quarter 4.5 oz tube | 0.12 | 32 | 2 |
| 1 tablespoon | 0.06 | 16.38 | 1 |
The table gives the full package, half a package and a quarter of a package, plus a single tablespoon, so you can scale the answer to whatever your recipe asks for. If your packet is a different size from the one on this page, the same per-cup figure still applies — divide your packet's weight by the grams per cup, or its volume by 236.6 ml per cup, and you have your answer.
Worked examples
Pasta sauce that needs two tablespoons
A pan of pasta sauce for four takes about 2 tablespoons of tomato paste — 33 g — fried in a tablespoon of oil with garlic before the tinned tomatoes go in. Two tablespoons is a quarter of the tube, so one tube makes about four pans of sauce. Fry the paste for a minute until it darkens: raw tomato paste tastes tinny and sharp, while fried paste tastes deep and sweet. The paste is there for body and colour as much as for flavour — a sauce without it tastes thin.
Soup that needs two tablespoons
A pot of soup for six takes about 2 tablespoons of tomato paste — 33 g — stirred in with the vegetables and stock. Two tablespoons is a quarter of the tube. The paste adds a savoury depth that tinned tomatoes alone do not provide, and it helps the soup's colour. Stir it in early so it has time to cook out: paste added at the end tastes raw and acidic. A squeeze of lemon at the end lifts the whole pot.
Stew that needs three tablespoons
A stew for six takes about 3 tablespoons of tomato paste — 49 g — fried with the onions before the stock and meat go in. Three tablespoons is just over a third of the tube, so one tube covers about two and a half stews. The paste caramelises slightly as it fries, which adds a richness that a stew made without it lacks. If the stew tastes flat at the end, a teaspoon of paste stirred in and simmered for ten minutes often fixes it better than more salt.
How the figure was measured
The weight figure on this page comes from USDA: tomato paste weighs 262 g per cup, measured spooned and levelled, and that figure carries medium confidence in CookScale's 120-ingredient table. Every cup-based result on this page is approximate, because a cup measures volume and the weight depends on how the ingredient settles, how it was measured, and how fresh it is. When the amount matters — a cake, a cheesecake, a sauce that must set — weigh the ingredient on a kitchen scale instead of trusting the cup. Package sizes vary by brand and region, so check the weight printed on your own packet before planning a recipe around this page.
How to measure it
Condiments are measured by volume, and the numbers on this page are the honest ones: a cup is 236.6 ml whether it holds soy sauce, ketchup or jam. Use a liquid jug for soy sauce and ketchup — read it at eye level on a flat surface — and a dry cup for jam and tomato paste, pressed in and levelled, since they hold their shape. Tomato paste from a tube is the easiest of all to measure by weight: squeeze it straight onto a scale and stop at the gram target, with no cup to scrape. Jam is the trickiest: warm the jar briefly and the jam loosens enough to pour, or use a spoon and accept that a little stays behind — that residue is why weighing beats cup-measuring for jam.
Practical guidance
Condiments live in the fridge door long after opening, which is fine, but their flavours fade with time — an opened bottle of soy sauce is at its best within a few months, and old ketchup turns darker and sharper. Keep the neck of a ketchup or jam jar clean so the lid seals properly; dried jam around the rim is the reason jars refuse to open. Never double-dip a knife into a jam jar — crumbs and butter ferment in the jar and shorten its life. Tomato paste in a tube keeps far longer than paste in a tin, which should be moved to a container and used within days. And when a bottle is nearly empty, measure what is left before starting a recipe that needs a full cup — a "nearly full" bottle is often a third short.
Half a cup is the figure, and the tube-versus-tin choice is the practical point: a tube costs more per gram than a tin, but a tin wastes most of its contents, so the tube is cheaper in practice for a household that uses paste a tablespoon at a time. The tube size is the variable — 6 oz tubes hold about 0.65 cups — and the same 262 g per cup applies throughout. Weigh the paste when a recipe gives grams: squeeze it straight onto a scale and stop at the target, with no spoon to scrape. And wipe the nozzle clean after each use, or mould grows there and shortens the tube's life.
Frequently asked questions
How many tablespoons are in a 4.5 oz tube of tomato paste?
There are 8 tablespoons in a 4.5 oz tube of tomato paste, because the tube holds about 0.5 cups and there are 16 tablespoons in a cup. A tablespoon of tomato paste weighs about 16.4 g. Most recipes use 1 to 3 tablespoons at a time, so a tube covers about three to eight recipes depending on how much each one uses.
How many grams are in a 4.5 oz tube of tomato paste?
A 4.5 oz tube of tomato paste weighs about 128 g. Divide that by 262 g per cup and you get about 0.5 cups. If a recipe gives grams rather than tablespoons, the gram figure is the one to use: 33 g is two tablespoons, 49 g is three tablespoons, and 128 g is the whole tube.
Can I substitute tomato puree for tomato paste?
Not cup-for-cup. Tomato paste is concentrated — about three times as strong as tomato puree — so 1 tablespoon of paste equals about 3 tablespoons of puree. If a recipe calls for 2 tablespoons of paste and you only have puree, use 6 tablespoons and simmer the sauce a little longer to reduce the extra liquid. The flavour is close, but the paste gives a deeper colour.
How long does an opened tube of tomato paste last?
An opened tube of tomato paste lasts about two months in the fridge, far longer than an opened tin, which must be used within a few days. Keep the cap on tight and squeeze the air out of the tube before closing it. Discard the tube if the paste smells sour or has mould at the nozzle — wipe the nozzle clean after each use to prevent mould growing there.
Why is tomato paste sold in a tube?
Because a tube keeps far better than a tin. Tomato paste is used a tablespoon at a time, and a tin, once opened, oxidises and grows mould within days — most of the tin is wasted. A tube squeezes out the air, seals tightly, and dispenses exactly the amount needed, so a 4.5 oz tube lasts for months in the fridge and nothing is wasted.