How many grams in a cup of vegetable oil?

1 cup of vegetable oil weighs 218 g by USDA's figure. King Arthur Baking lists 198 g.

Sources: USDA FoodData Central, King Arthur Baking ingredient weight chart · Checked October 10, 2026

Amount

Unit

218 g 7.7 oz

Sources range from 198 g to 218 g for 1 cup.

Converting a whole recipe?

Sous Chef converts every ingredient in a recipe to grams and millilitres in one tap, rounded to amounts you would actually weigh.

Vegetable oil cups to grams table

Using 218 g per US cup. A US cup is 236.6 mL; 1 cup is 16 tablespoons.

Vegetable oil cups to grams
US cups	Grams	Ounces	Tablespoons
⅛ cup	27 g	1 oz	2
¼ cup	55 g	1.9 oz	4
⅓ cup	73 g	2.6 oz	5.3
½ cup	109 g	3.8 oz	8
⅔ cup	145 g	5.1 oz	10.7
¾ cup	164 g	5.8 oz	12
1 cup	218 g	7.7 oz	16
1½ cups	327 g	11.5 oz	24
2 cups	436 g	15.4 oz	32
3 cups	654 g	23.1 oz	48
4 cups	872 g	30.8 oz	64

Why sources disagree

Oil is lighter than water, which is why it floats. A cup of water weighs about 237 g, so a cup of oil weighing about 218 g fits what you would expect, and that is the figure we use. King Arthur's chart lists 198 g. For most recipes the difference is small, but weigh if you are baking by grams.

Source	Listed as	Grams per cup
USDA FoodData Central Oil, vegetable, soybean, refined	1 cup = 218 g	218 g
King Arthur Baking ingredient weight chart Vegetable oil	1 cup = 198 g	198 g

Bold row is the figure the calculator uses. Figures listed for a smaller measure are multiplied up to one cup.

How to measure vegetable oil accurately

Weigh oil into the bowl to avoid the film left in a cup.
Weigh on a digital scale when you can, since it skips the mess of measuring cups.
Use a clear liquid measuring cup on a flat counter and read it at eye level.

Convert the whole recipe, not one line

Converting a recipe one ingredient at a time is where mistakes slip in. Sous Chef imports a recipe from a link or pasted text, then converts every ingredient at once: dry ingredients and butter to grams, liquids to millilitres. Tap again to go back to cups.

US recipe

2¼ cups all-purpose flour
1 cup butter, softened
¾ cup brown sugar, packed
1½ cups milk

In Sous Chef, after "Convert to metric"

275 g all-purpose flour
225 g butter, softened
170 g brown sugar, packed
350 ml milk

Example output. Sous Chef rounds to amounts you would actually weigh, so its numbers can differ by a few grams from the table above.

Common questions

How many grams is half a cup of vegetable oil?

Half a cup of vegetable oil is about 109 g, using 218 g per cup.

How many grams is 1 tablespoon of vegetable oil?

1 tablespoon of vegetable oil is about 14 g, since 1 cup is 16 tablespoons and 218 g per cup divided by 16 is 14 g.

More conversions

Cook in grams without doing the math.

Import any recipe and Sous Chef converts it, scales it, or swaps an ingredient for you. Free to download on iPhone.