How Many Grams in a Cup of Olive Oil?

Olive oil is a staple fat in Mediterranean cooking and many cake recipes that use oil instead of butter. One US cup weighs approximately 216 grams—lighter than water by volume because oil is less dense. Extra virgin and light olive oil share the same weight per cup; flavor and smoke point differ, not density.

Measure olive oil in a liquid measuring cup at eye level or weigh 216 grams per cup. For salad dressings and marinades, combining weight and volume speeds prep when scaling recipes. Avoid measuring over the mixing bowl where parallax error is common.

Mistakes include substituting olive oil one-for-one for butter without adjusting for butter's water content—butter is about 16 percent water. Using strong extra virgin olive oil in delicate cakes adds peppery flavor some bakers find undesirable; neutral light olive oil avoids this. Confusing fluid ounces with weight ounces leads to errors—8 fluid ounces of oil is 216 grams, not 227.

Store olive oil in a cool, dark place away from the stove; heat and light degrade quality. Use within 12 to 18 months of opening. Substitute vegetable oil at 218 grams per cup or coconut oil at 218 grams with melting considerations for solid coconut oil.

Olive oil at 216 grams per cup suits cakes and quick breads that use oil for moisture without creaming aeration. Extra virgin oil brings peppery notes that complement citrus and almond cakes but can overwhelm delicate vanilla sponges. When converting butter recipes to olive oil, use about three-quarters the butter weight in oil and add back a small amount of milk for lost water content. Salad dressing recipes scaled by weight maintain emulsion balance better than those measured only by volume, especially when mustard and honey also benefit from gram measurements.

When dressing pasta salads, weigh oil with vinegar at a three-to-one oil-to-acid ratio by grams for repeatable tang without drowning greens—216 grams per cup makes mental math simple for quarter-cup portions.