1/2 Cup Vegetable Oil in Grams
1/2 cup of vegetable oil weighs 109 g (poured, USDA). Neutral-flavoured oil, usually a soybean or canola blend. All the figures on this page are approximate conversions based on the USDA value, so when a recipe really matters, verify with a kitchen scale.
Neutral-flavoured oil, usually a soybean or canola blend. It is used for frying, baking, dressings and mayonnaise. That range of uses is part of why the conversion comes up so often: the same ingredient appears in everyday cooking and in precise baking, and the two situations demand different levels of accuracy. Knowing the weight of half a cup, rather than guessing from a measuring cup, keeps the result consistent no matter which recipe you are following.
Why weighing half a cup of vegetable oil beats measuring it in cups
Half a cup is the amount most recipes reach for when fat is a main ingredient: a cake, a batch of cookies, a pie crust or a pan of roasted vegetables. vegetable oil is dense and rich, so the difference between a level half-cup and a heaped one is real money in calories and real change in texture. The 109 g figure on this page is the standard for vegetable oil measured poured, so it gives you a fixed anchor whether the fat is cold from the fridge or soft on the bench. Once you know the weight, scaling a recipe up or down becomes simple arithmetic instead of a gamble.
Vegetable Oil cups to grams conversion table
| Cups | Grams (approx.) |
|---|---|
| 1/4 cup | 54.5 g |
| 1/3 cup | 72.5 g |
| 1/2 cup | 109 g |
| 2/3 cup | 145.5 g |
| 3/4 cup | 163.5 g |
| 1 cup | 218 g |
| 1 1/2 cups | 327 g |
| 2 cups | 436 g |
| 3 cups | 654 g |
One tablespoon of vegetable oil weighs about 13.5 g, and one teaspoon about 4.5 g. For small amounts a scale that reads to the gram is far more reliable than a spoon, because a heaped tablespoon can weigh half as much again as a level one. The table is rounded to the nearest half gram, so the numbers are approximate by design; the half-cup figure of 109 g is the one to use when a recipe calls for half a cup.
How the weight was measured
Poured means pouring the ingredient into a liquid measuring jug on a flat surface and reading the level at eye level. Liquids level themselves, so there is no spooning or levelling involved, and the weight follows directly from the volume and the density.
The source for the 218 g per cup figure is USDA, and the confidence in the value is high. USDA publishes a standard ingredient weight chart that recipe developers use as a reference, and this page follows it exactly rather than averaging across sources, because an average of two different measuring methods is a number that matches nobody's cup.
There is a dispute worth knowing about. USDA density (0.92 g/ml) gives 218 g per cup. The King Arthur chart lists 198 g for vegetable oil, which appears to be an error carried from a smaller measure; we use the USDA density value. The practical advice is simple: use the value in the table above, measure the way the table describes, and your results will match the recipes this site is built around. If a recipe you are following was written with a different value, follow that recipe's value instead of ours, because consistency within one recipe matters more than which authoritative number you pick.
All the figures on this page are approximate conversions. When a recipe really matters, verify with a kitchen scale: weigh the ingredient directly into the bowl on a tared scale and trust that number over any cup.
Worked examples
A pie crust
A pie crust using 1/2 cup of vegetable oil needs 109 g, and the fat must be cold and weighed precisely because it creates the flakes. Too much fat and the crust is greasy; too little and it turns tough. Weigh the fat, cut it in cold, and the crust will be flaky.
Scaling up a traybake
A traybake that starts with 2 cups of vegetable oil needs 436 g. At that scale a cup-measure error compounds badly, and a greasy traybake is hard to rescue, so weighing the full amount on a scale is the only sensible approach.
Frying or sauteing
A stir-fry needing 2 tablespoons of vegetable oil takes about 27 g. A tablespoon of oil is easy to over-pour, but a scale reads it instantly and the pan stays at the right temperature.
When this conversion matters most
The weight matters whenever vegetable oil is doing structural work rather than just adding richness. In pastry the fat creates flakes; in a cookie it decides how far the dough spreads; in a cake it decides whether the crumb is tender or tough. In a pan of fried food, by contrast, a gram or two either way is invisible, so save the scale for the bakes where it counts and pour freely where it does not.
Common mistakes with vegetable oil
- Using a liquid jug for a solid fat. Jugs are for pouring and you cannot pack a solid fat into one accurately. Use a dry measuring cup, or a scale set to 109 g for 1/2 cup.
- Softening fat in the microwave. Microwaving melts the edges while the centre stays cold, so the fat packs unevenly. Soften at room temperature, then weigh 109 g.
- Rounding down to save time. Rounding 109 g to a neat number feels tidy but is a real error in a small bake. Keep the real figure; the scale does the work for you.
- Swapping fats by volume. Different fats weigh different amounts per cup, so swapping vegetable oil for another fat cup-for-cup changes the recipe. Swap by weight instead.
Storage and handling
Cool, dark cupboard; use within 6 months of opening. Keeping vegetable oil stored properly also keeps its weight per cup stable: an ingredient that has absorbed moisture from the air weighs more per cup than a dry one, so good storage is not just about freshness, it is about measurement accuracy too. If a container has been open for months in a humid kitchen, the first thing to do before a precise bake is to weigh the ingredient rather than trusting the cup.
Frequently asked questions
How many grams is 1/2 cup of vegetable oil?
1/2 cup of vegetable oil weighs 109 g, measured poured according to USDA. That is the figure to use when converting a recipe from cups to grams, and it is the value the conversion table on this page is built on.
How do I measure vegetable oil without a scale?
Poured means pouring the ingredient into a liquid measuring jug on a flat surface and reading the level at eye level. Liquids level themselves, so there is no spooning or levelling involved, and the weight follows directly from the volume and the density. That gives the closest result to 109 g per half-cup, but it is still an estimate: the honest answer is that a scale is the only way to know the exact weight, and a basic digital kitchen scale costs less than a bag of good flour.
Does 1/2 cup of vegetable oil always weigh 109 g?
No. Temperature, brand and how firmly a solid fat is packed all shift the weight by a few grams. The 109 g figure is the standard USDA value for vegetable oil measured poured, and it is the right default, but when a recipe is precise, weigh the ingredient and trust the scale over the cup.
What is vegetable oil used for?
Frying, baking, dressings and mayonnaise. Neutral-flavoured oil, usually a soybean or canola blend.
Should I measure vegetable oil melted or solid?
Measure it in the state the recipe specifies. Melted fat takes up less volume than solid fat, so a cup of melted vegetable oil weighs more than a cup of solid vegetable oil. Weighing 109 g avoids the question entirely, because grams do not change when the fat melts.
How should I store vegetable oil?
Cool, dark cupboard; use within 6 months of opening. Good storage keeps the ingredient fresh and keeps its weight per cup consistent, because moisture absorbed from the air adds grams that the recipe did not ask for.
Related conversions
Use the butter to oil converter or the cups to grams converter for instant answers, or browse the cups to grams hub for the full ingredient list. Related pages: Vegetable Oil in cups to grams, 1/2 cup butter in grams, 1/2 cup olive oil in grams, 1/2 cup coconut oil in grams. More tools: cups to grams converter, grams to cups converter, recipe scaler. See also our disclaimer about approximate conversions.