To convert cups of vegetable oil into ounces, multiply by 7.6897237: one cup comes to 7.6897237 ounces. Every ingredient has its own figure here, because the units are measuring different things and only the density links them.
Water is the yardstick: 1 mL of it weighs 1 g. Vegetable oil comes in at 0.92143 g per mL, or 92.14% of water, which is why a cup of it is 218 g rather than 236.6 g. Volume and weight only line up for water, and only in metric.
A cup of vegetable oil is 218 g when it is measured the standard way, but how it gets into the cup changes the answer: between about 216.9 g and 220.2 g covers the range from lightly spooned to firmly packed. That 1% spread is larger than most of the adjustments recipes fuss over, and it disappears entirely the moment the ingredient is weighed instead.
One cup of vegetable oil is 7.69 oz. US kitchen scales usually step in eighths of an ounce, which is 3.54 g — around 1.63% of a cup of this ingredient, so the scale is precise enough for a full cup and coarse for a spoonful. That is why recipes mix the two systems: ounces for the bulk, spoons for the small amounts.
The condition this weight assumes: Every culinary oil is about 92% the density of water, which is precisely why oil floats on it.
The formula
cups- The amount of vegetable oil you are converting, in cups
7.68972370501- Ounces per cup for vegetable oil, from its density of 0.92143 g/mL
ounces- The equivalent quantity in ounces
How it works, step by step
- Enter the quantity in cups.
- It is multiplied by 7.68972370501, the ounces-per-cup figure for vegetable oil.
- The result appears in ounces, with a second reading in g beneath it.
- Use the measure table if you want a standard recipe quantity rather than a number you type in.
Worked examples
1/3 cup of vegetable oil in ounces
1/3 cup of vegetable oil weighs out at 2.56324 ounces. Divide 2.56324 by 7.6897237 and you get back to 1/3 cup, which is the quickest check that the factor is the right way up.
3/4 cup of vegetable oil in ounces
Take 3/4 cup of vegetable oil: 0.75 × 7.6897237 gives 5.76729 ounces. Doubling the batch takes it to 11.5346 ounces, because the relationship is a straight proportion once the density is known.
3 cup of vegetable oil in ounces
A recipe calling for 3 cup of vegetable oil needs 23.0692 ounces on the scale. The arithmetic is 3 × 7.6897237 = 23.069171, and halving the recipe halves the weight to 11.5346 ounces.
How to read your score
Frequently asked questions
How many ounces are in 1 cup of vegetable oil?
One cup of vegetable oil is 7.6897237 ounces. Half that quantity is 3.84486 ounces and double it is 15.3794 ounces, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of vegetable oil not 236 g like water?
Because weight per cup depends on what is in the cup. Vegetable oil has a density of 0.92143 g per mL where water has 1.00, so a cup of it weighs 218 g rather than 236.6 g. That is a difference of 18.6 g per cup, and it is the reason a single volume-to-weight factor cannot be applied to every ingredient.
Does how I measure it change the weight?
Barely. Vegetable oil does not compress, so a cup of it is 218 g however it is poured — within about 1%, which is inside the accuracy of a domestic scale. This is the group where measuring by volume is defensible.
Is a fluid ounce of vegetable oil the same as an ounce?
No. A fluid ounce is a volume — one eighth of a US cup, 29.57 mL — and an ounce is a weight. One fluid ounce of vegetable oil weighs 0.9612 oz, so the two readings differ by 3.88%. They coincide only for something with the density of water, and then only roughly.
Is this a US cup or a metric cup?
US customary: 236.59 mL, which is the cup every US recipe means. A metric cup is 250 mL, so the same cup of vegetable oil would weigh 230.36 g instead of 218 g — 12.4 g more, or 5.67%. Australian and some European recipes use the metric cup, and the difference is large enough to matter in baking.
Do I need a scale for this, or will measuring cups do?
A scale, if the result matters. Volume measuring carries a spread of about 1% for vegetable oil — roughly 2.18 g on a 218 g cup — while a domestic scale is accurate to a gram or two. For anything where the ratio of ingredients drives the outcome, bread and pastry above all, weigh it.
How many cups of vegetable oil is 16 oz?
16 oz of vegetable oil is 2.0807 cups — 0.130044 cups to one ounce, so 16 × 0.130044 = 2.0807. Going that way is a division by 7.68972, or a multiplication by 0.130044 if you prefer.
Vegetable oil in cups and ounces
| Cups | Ounces | Unrounded |
|---|---|---|
| 1/8 cup | 0.961215 oz | 0.9612154631 |
| 1/4 cup | 1.92243 oz | 1.922430926 |
| 1/3 cup | 2.56324 oz | 2.563241235 |
| 1/2 cup | 3.84486 oz | 3.844861853 |
| 2/3 cup | 5.12648 oz | 5.12648247 |
| 3/4 cup | 5.76729 oz | 5.767292779 |
| 1 cup | 7.68972 oz | 7.689723705 |
| 1 1/2 cup | 11.5346 oz | 11.53458556 |
| 2 cup | 15.3794 oz | 15.37944741 |
| 3 cup | 23.0692 oz | 23.06917112 |
| 4 cup | 30.7589 oz | 30.75889482 |
Based on 218 g per cup of vegetable oil. One cup of vegetable oil is 7.6897237 ounces.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 218 g | 7.69 oz | 236.6 mL |
| 3/4 cup | 163.5 g | 5.77 oz | 177.4 mL |
| 2/3 cup | 145.3 g | 5.13 oz | 157.7 mL |
| 1/2 cup | 109 g | 3.84 oz | 118.3 mL |
| 1/3 cup | 72.67 g | 2.56 oz | 78.86 mL |
| 1/4 cup | 54.5 g | 1.92 oz | 59.15 mL |
| 1 tbsp | 13.62 g | 0.481 oz | 14.79 mL |
| 1 tsp | 4.542 g | 0.16 oz | 4.929 mL |
US customary measures: 1 cup = 236.59 mL, 1 tbsp = 14.79 mL, 1 tsp = 4.93 mL.
| Ingredient | Grams per cup | Ounces per cup | Density (g/mL) |
|---|---|---|---|
| Olive oil | 216 g | 7.619 oz | 0.913 |
| Vegetable oil (this page) | 218 g | 7.69 oz | 0.9214 |
| Coconut oil | 218 g | 7.69 oz | 0.9214 |
| Mayonnaise | 220 g | 7.76 oz | 0.9299 |
| Cream cheese | 227 g | 8.007 oz | 0.9595 |
| Water | 236 g | 8.325 oz | 0.9975 |
| Heavy cream | 238 g | 8.395 oz | 1.006 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.