A 500 ml bottle of vegetable oil holds about 2.1 cups — the same volume as a 500 ml bottle of olive oil, because a cup is a measure of volume and every liquid fills it the same way. Vegetable oil is the neutral workhorse of the kitchen: no flavour to speak of, a high smoke point, and cheap enough that a bottle is rarely worth rationing. Two cups is enough for a week of frying, baking and dressings in most households.
How many cups in a 500 ml bottle?
A 500 ml bottle of vegetable oil holds about 2.1 cups (500 ml ÷ 236.6 ml per cup).
| Amount | Cups | Millilitres | Tablespoons | Grams (approx.) |
|---|---|---|---|---|
| Full 500 ml bottle | 2.1 | 500 | 34 | 460.69 |
| Half 500 ml bottle | 1.05 | 250 | 17 | 230.35 |
| Quarter 500 ml bottle | 0.53 | 125 | 8 | 115.17 |
| 1 tablespoon | 0.06 | 14.8 | 1 | 13.64 |
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
Cake that needs half a cup of oil
An oil-based cake — a carrot cake or a chocolate sheet cake — takes about 1/2 cup of vegetable oil, or 118 ml, along with 2 cups of flour and 3 eggs. Oil cakes stay moist longer than butter cakes, which is why bakeries favour them for cakes that must keep for days. Half a cup is a quarter of the bottle, so one 500 ml bottle makes four oil cakes. Measure the oil in a jug rather than pouring from the bottle: an extra tablespoon of oil in a cake batter makes it greasy rather than moist.
Frying batter that needs a cup of oil
A shallow fry for fritters or fried chicken takes about 1 cup of vegetable oil in the pan — half the bottle. That leaves just over a cup for the next fry, so a single bottle covers two shallow-frying sessions. Do not pour the used oil back into the bottle: strain it into a separate jar if you want to reuse it, and use it within a few days. Fresh oil fries cleaner and browns more evenly than oil that has already been heated twice.
Mayonnaise that needs three-quarters of a cup
A jar of homemade mayonnaise takes about 3/4 cup of vegetable oil — around 177 ml — drizzled slowly into 1 egg yolk with 1 tablespoon of vinegar and a pinch of salt. The oil must go in slowly or the emulsion breaks, and a measuring jug with a spout gives you the control a bottle does not. Three-quarters of a cup is a little over a third of the bottle, so one bottle makes about two and a half jars of mayonnaise.
How the figure was measured
The weight figures on this page come from USDA: vegetable oil weighs about 218 g per cup, measured poured, and that figure carries high confidence in CookScale's 120-ingredient table. But the cup figures themselves do not depend on weight at all — a cup is 236.6 ml whether it holds oil, milk, cream or soy sauce — so the headline answer is exact arithmetic, not an estimate. The gram figures are the approximate ones, because they depend on density, and they should be verified with a kitchen scale when a recipe gives grams and the amount matters. Package sizes vary by brand and region, so check the volume printed on your own bottle or carton before planning around this page.
There is a dispute note on this figure: the King Arthur chart lists vegetable oil at 198 g per cup, which appears to be an error carried from a smaller measure. The USDA density of 0.92 g per ml gives 218 g per cup, and that is the figure CookScale uses.
How to measure it
Oil is measured by volume, which makes this page simpler than the dry-ingredient ones: a cup is 236.6 ml no matter what is in it, so the bottle's millilitres divide cleanly into cups. Use a liquid measuring jug with a spout, read it at eye level on a flat counter, and let the oil settle — a jug tilted in your hand reads a tablespoon high. For small amounts a tablespoon measure is more accurate than eyeballing a jug line. If a recipe gives grams instead, weigh the oil: it is lighter than water, so 1 cup of olive oil is about 216 g and 1 cup of vegetable oil about 218 g, not 237 g. Mixing up oil and water weights is the most common conversion error in baking.
Practical guidance
Oil goes rancid long before it looks or smells obviously wrong, and a 500 ml bottle opened for occasional cooking can sit for months. Store it in a cool, dark cupboard away from the stove — heat and light are what turn it. Taste a drop before using an old bottle in a vinaigrette: if it is bitter or sharp in a stale way, it is past its best and will carry that flavour into everything. Never pour used oil back into the fresh bottle, and keep the cap on: oil absorbs strong smells from the pantry. For frying, measure what you need into the pan rather than pouring from the bottle over a hot hob, where a slip becomes a fire risk.
A 500 ml bottle is the size to buy when you cook with oil a few times a week; a litre bottle is better value but takes longer to finish, and oil that sits open for six months is not the oil you want in a cake. If a recipe calls for 2 cups of oil and your bottle is nearly empty, measure what is left before you start — a bottle that looks half full often holds less than a cup, because the bottle's shoulders hide the true level. For deep frying, a 500 ml bottle is not enough on its own: most pans need a litre or more, so buy accordingly rather than topping up mid-fry.
Frequently asked questions
How many cups are in a 500 ml bottle of vegetable oil?
There are about 2.1 cups in a 500 ml bottle of vegetable oil. A US cup is 236.6 ml, so 500 ml divided by 236.6 ml gives 2.11 cups — about 34 tablespoons. The figure is exact for volume, since a cup measures space, not weight.
How many grams are in a 500 ml bottle of vegetable oil?
A 500 ml bottle of vegetable oil weighs about 461 g. Vegetable oil has a density of about 0.92 g per ml, and the USDA figure is 218 g per cup. Note that the King Arthur chart lists 198 g per cup for vegetable oil, which appears to be an error — the USDA density value is the one to use.
Is vegetable oil the same as canola oil?
Not exactly, though they behave the same in most recipes. Vegetable oil is usually soybean oil or a blend, while canola oil is pressed from rapeseed. Both are neutral, both measure the same cup-for-cup, and both have high smoke points. Canola oil is slightly lower in saturated fat. For frying and baking, they are interchangeable by volume.
Can I substitute vegetable oil for butter in baking?
Yes, but not cup-for-cup. Use 3/4 cup of vegetable oil for every 1 cup of butter, because butter is about 20 percent water and oil is pure fat. An oil cake made with a full cup of oil where the recipe called for a cup of butter will be greasy. Melted butter and oil swap more freely, but the texture still changes — oil cakes are moist and tender, butter cakes are richer and firmer.
How should I store an opened bottle of vegetable oil?
Store it in a cool, dark cupboard with the cap on tight. Vegetable oil keeps for several months after opening, longer than olive oil, but heat and light still turn it rancid. Keep it away from the stove and out of sunlight. If it smells stale or tastes bitter, discard it — rancid oil is not rescued by cooking.