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Cooking conversion
Ounces of Vegetable Oil to Cups
How many cups of vegetable oil are in a given weight? Type a number of ounces below to see the volume. Math uses vegetable oil's density of 0.921 g/mL.
Calculator
100 oz of vegetable oil = 13.0105 cup
Ounces of Vegetable Oil to Cups Conversion Table
Common values for vegetable oil:
| Ounces of vegetable oil | Cups |
|---|---|
| 10 oz | 1.301 cup |
| 25 oz | 3.2526 cup |
| 50 oz | 6.5052 cup |
| 100 oz | 13.0105 cup |
| 150 oz | 19.5157 cup |
| 200 oz | 26.021 cup |
| 250 oz | 32.5262 cup |
| 500 oz | 65.0524 cup |
| 1000 oz | 130.1 cup |
How this works
Vegetable oil has a density of about 0.921 g/mL (usda fooddata central). That means 1 mL of vegetable oil weighs 0.921 grams.
Cups = ounces × 0.1301
Note: Includes canola, corn, soybean blends.
Why a cup of vegetable oil doesn't always weigh the same
Volume measurements are forgiving in some ways and brutal in others. A cup of vegetable oil can vary by 10-20% in weight depending on how it's measured: spooned vs scooped, packed vs loose, sifted vs unsifted. The density figure used here (0.921 g/mL) matches the most common published recipe conventions, but if you're after baking precision, weighing on a kitchen scale is more accurate than measuring by volume.
Sourced from USDA FoodData Central. Includes canola, corn, soybean blends.
Volume vs weight in cooking
The American convention of measuring ingredients by volume (cups, tablespoons, teaspoons) is convenient but introduces variability that doesn't exist in weight-based recipes. Most professional bakers and bakeries weigh ingredients to within a gram because the structure of baked goods depends on precise ingredient ratios. For everyday cooking — soups, sauces, sautés — the volume-to-weight imprecision rarely matters. For baking that depends on rising or texture (cakes, breads, laminated doughs), it matters a lot.
The conversion
Multiplying the volume of vegetable oil by its density (0.921 g/mL) gives the weight in grams. The calculator at the top of this page does the math automatically; the formula box above shows the resulting linear factor for the specific volume and weight units selected here.