| US cup amount | Weight |
|---|---|
| 1/8 cup | 25 g |
| 1/4 cup | 50 g |
| 1/3 cup | 66 g |
| 1/2 cup | 99 g |
| 3/4 cup | 148 g |
| 1 cup | 198 g |
| 1 1/2 cups | 297 g |
| 2 cups | 396 g |
Oil Grams to Cups
1 US cup of vegetable oil weighs 198 grams. One US cup of liquid vegetable oil weighs 198 grams using the selected baking reference. Oil is lighter than water, so its gram weight per cup is lower than a water-based liquid.
Use the converter and charts below for liquid vegetable oil.
Grams to Cups Converter
Choose the ingredient before converting because every ingredient has a different weight per cup.
Grams to Cups Converter
Results use the documented ingredient state and one US customary cup.
Divide the gram amount by 198 to calculate US cups. The practical fraction is a measuring aid, not a replacement for the exact gram weight.
| Grams | US cups | Practical reference |
|---|---|---|
| 25 g | 0.13 cups | about 1/8 cup |
| 30 g | 0.15 cups | about 1/8 cup |
| 40 g | 0.2 cups | about 1/4 cup |
| 50 g | 0.25 cups | about 1/4 cup |
| 60 g | 0.3 cups | about 1/3 cup |
| 75 g | 0.38 cups | about 3/8 cup |
| 80 g | 0.4 cups | about 3/8 cup |
| 100 g | 0.51 cups | about 1/2 cup |
| 120 g | 0.61 cups | about 5/8 cup |
| 125 g | 0.63 cups | about 5/8 cup |
| 150 g | 0.76 cups | about 3/4 cup |
| 200 g | 1.01 cups | 1 cup |
| 250 g | 1.26 cups | about 1 1/4 cup |
| 300 g | 1.52 cups | about 1 1/2 cup |
| 400 g | 2.02 cups | 2 cups |
| 500 g | 2.53 cups | about 2 1/2 cup |
Use a liquid measuring cup on a flat surface and read the mark at eye level. Weighing oil directly into a bowl is cleaner when a recipe already lists the amount in grams.
Grams = cups × 198
One cup is 198 grams, one-half cup is about 99 grams and one-quarter cup is about 50 grams.
Common uses
- Cakes and quick breads
- Dressings and marinades
- Shallow frying and sauces
Canola, sunflower, corn and olive oils are close in density but not perfectly identical. This page uses vegetable oil as the general working standard and labels the approximation.
The converter does not assume that every cup weighs 237 or 250 grams. It uses the documented value for the exact ingredient and state selected.
If a product label or recipe publisher supplies a different gram weight for one cup, follow that recipe-specific value for the closest match to the original testing.
Method and source
How this conversion was checked
This page uses 198 grams per US cup for liquid vegetable oil. Different cooking oils are close but not perfectly identical.
Primary reference: King Arthur Baking Ingredient Weight Chart
Cup standard: NIST US customary cup reference
How many grams are in one cup of vegetable oil?
One US cup of liquid vegetable oil uses a working reference of 198 grams on GramstoCup.co.
How many cups is 100 grams of vegetable oil?
100 grams of liquid vegetable oil is 0.51 US cups.
How many grams is half a cup of vegetable oil?
Half a US cup is approximately 99 grams using the 198 gram full-cup reference.
Can the result vary by brand or method?
Yes. Different cooking oils are close but not perfectly identical. Use the original recipe weight when precision is important.
Are these US cups or metric cups?
The results use a US customary cup. A metric cup is 250 milliliters and can produce a different answer.
Other Ingredient Guides
Each guide uses its own grams-per-cup standard.
Editorial review
Reviewed for clarity and consistency
Written and reviewed by William Leo. Ingredient values are checked against the methodology and sources listed on this page.
Last reviewed
August 23, 2026