There are about 1.9 cups in a pound of ketchup — approximately, because the figure depends on how the ingredient is measured. One US cup of ketchup weighs 240 g spooned and levelled, so 453.59 g (one pound) divided by 240 g gives about 1.89 cups. That is the short answer, and the rest of this guide explains where the number comes from, how much it moves when the measuring method changes, and how to use it in real recipes — from a weeknight dinner to a freezer full of baking.
Ketchup is a thick, spoonable sauce, and a cup weighs about 240 g — so a pound is only about 1.9 cups. It is sold by weight and used by the squirt, which means almost nobody measures it by the cup until a barbecue sauce recipe asks for two cups and the bottle turns out to hold less than expected. This page closes that gap.
Every figure on this page is labelled approximate, and for good reason: cup measurements vary with packing, moisture and the size of the pieces. When a recipe depends on the amount — a cake, a loaf of bread, a jam that has to set — weigh the ingredient on a kitchen scale instead of trusting the cup. The scale is the only measuring tool that does not care how you filled the cup.
The conversion at a glance
One cup of ketchup weighs 240 g spooned and levelled. A pound is 453.59 g (16 oz), so the arithmetic is 453.59 ÷ 240 = about 1.89 cups. The table below gives the cup equivalents for the amounts you are most likely to meet, whether you are scaling a recipe up or working out how far a bag or jar will go. All figures are approximate, and all of them use the same 240 g per cup.
| Amount | Grams | Cups (approx.) | Tablespoons (approx.) |
|---|---|---|---|
| 1/4 lb (4 oz) | 113 g | 0.5 cups | 8 tbsp |
| 1/2 lb (8 oz) | 227 g | 0.9 cups | 15 tbsp |
| 1 lb (16 oz) | 454 g | 1.9 cups | 30 tbsp |
| 2 lb (32 oz) | 907 g | 3.8 cups | 60 tbsp |
| 3 lb (48 oz) | 1361 g | 5.7 cups | 91 tbsp |
| 5 lb (80 oz) | 2268 g | 9.4 cups | 151 tbsp |
A single tablespoon of ketchup weighs about 15.0 g, and a teaspoon about 5.0 g — useful when a recipe calls for a spoonful rather than a cup. And because a kilogram is 1,000 g, the same density gives about 4.2 cups per kilogram: the two conversions are the same arithmetic with the same 240 g per cup, just with a different starting weight.
Worked examples
A barbecue sauce for the summer
Homemade barbecue sauce is the recipe that uses ketchup by the cup. A batch for a summer of grilling needs 2 cups of ketchup, about 480 g, simmered with brown sugar, vinegar and spices. A pound gives about 1.9 cups, so you need just over a pound — a 32 oz bottle, which holds about 3.8 cups, covers two batches. Simmer the sauce for at least 20 minutes: the raw tomato sharpness cooks off and the flavours meld into something that tastes like barbecue sauce rather than sweetened ketchup.
A meatloaf glaze
A meatloaf glaze is the small, precise use for ketchup. A meatloaf for six needs about half a cup of ketchup for the glaze, about 120 g, mixed with brown sugar and mustard and spread over the top for the last 20 minutes of baking. A pound covers four meatloaves. Apply the glaze late: ketchup is mostly sugar, and a glaze applied at the start burns before the meatloaf is cooked through.
A cocktail sauce for a seafood platter
Cocktail sauce is the quick use for ketchup. A bowl for a seafood platter needs about 1 cup of ketchup, about 240 g, mixed with horseradish and lemon juice. A pound covers nearly two bowls. Taste and adjust the horseradish rather than measuring it precisely: horseradish varies in heat from jar to jar, and a cocktail sauce that is too hot is worse than one that is too mild.
How the figure is measured
The headline figure comes from the CookScale ingredient table, which lists ketchup at 240 g per US cup (236.6 ml), spooned and levelled, sourced from USDA with medium confidence. Sweet tomato condiment. The table's uses for ketchup are: Dipping, burgers, glazes and sauces.
The method matters more than most people realise. Spooned and levelled is the standard for this ingredient, and a different method gives a different weight: scooping instead of spooning compresses dry ingredients and can add 10–20% to the weight of a cup, while packing a sticky ingredient can add even more. That is why this guide states the method alongside every figure, and why the headline number is always labelled approximate. If you measure differently from the stated method, expect a different result — and if the recipe matters, weigh the ingredient instead.
One practical consequence: never convert in the wrong direction by accident. To go from cups to grams, multiply the cups by 240. To go from grams to cups, divide the grams by 240. To go from pounds to cups, divide the grams (453.59 per pound) by 240. Keep the 240 g figure in mind and the rest is simple division — but always check the result against a scale when the bake depends on it.
Practical guidance
The mistake is measuring ketchup in a dry cup. Ketchup is thick and sticky, it traps air bubbles and it clings to the cup, so a dry-cup measurement can be short by a tenth or more. Use a liquid measuring jug, or weigh it — 240 g is one cup — and use a flexible spatula to get it all out of the container. Weighing is especially worth it for barbecue sauce, where ketchup is the main ingredient and a short measure changes the whole balance.
Storage: Refrigerate after opening; use within 6 months. Weighing the ingredient before you store it, and writing the weight on the container, saves a conversion later: a tub labelled '450 g' tells you instantly that it holds about 1.9 cups, without any measuring at all.
When you do not have a scale: use the cup, but use it carefully. Spoon the ingredient into a dry measuring cup — never scoop from the bag — and level the top with the back of a knife without tapping or shaking the cup. For sticky or wet ingredients, use a liquid measuring jug and read the level at eye height, or lightly oil the cup so the ingredient releases cleanly. Accept that the result will be approximate, and if the recipe is a cake, a loaf or a jam, borrow a scale: it is the single most useful tool in baking, and it costs less than a bag of the flour it measures.
Frequently asked questions
How many cups are in a 32 oz bottle of ketchup?
A 32 oz (907 g) bottle holds about 3.8 cups of ketchup, because one cup weighs about 240 g. A 20 oz bottle is about 2.4 cups and a 14 oz bottle about 1.7 cups. Bottles are sold by weight, so divide the bottle weight in grams by 240 to get the cups for any size — a pound is about 1.9 cups.
Does ketchup weigh the same as tomato sauce?
Near enough for practical purposes. Ketchup is about 240 g per cup and tomato sauce is about 245 g per cup, so the two are within 2% of each other. The difference is flavour, not weight: ketchup is sweetened and spiced, tomato sauce is plain. You can swap them by weight in a pinch, but the seasoning will need adjusting.
How long does ketchup keep once opened?
About 6 months in the fridge. Ketchup is acidic and high in sugar, both of which preserve it, but the flavour fades and the colour darkens over time. An unopened bottle keeps about a year in the cupboard. If the ketchup has separated or smells sharp and vinegary, it is past its best — and a pound of ketchup used in barbecue sauce disappears fast enough that storage is rarely a problem.
Should I weigh ketchup or measure it in cups?
Weigh it whenever the recipe matters. One cup of ketchup weighs 240 g spooned and levelled, but that figure assumes the stated method — and in practice, cups vary by 10–20% depending on how they are filled. A kitchen scale removes that variation entirely: 240 g is one cup, every time, regardless of who is measuring. Cups are fine for soups, salads and smoothies, where a little more or less makes no difference. For baking, jam, bread and anything where the ratio of ingredients decides the outcome, the scale is the right tool.
How accurate is the about 1.9 cups figure?
It is accurate to about plus or minus a quarter of a cup per pound, which is roughly the variation you get from different measuring methods and different batches of the ingredient. The figure is calculated from a single sourced density — 240 g per cup from USDA, medium confidence — and the arithmetic is exact: 453.59 ÷ 240 = 1.89 cups. The uncertainty is not in the maths but in the cup itself: a scooped cup weighs more than a spooned cup, and a packed cup weighs more than a loose one. Treat 1.9 cups as a planning figure and verify with a scale when it matters.