How Many Grams in a Cup of Vegetable Oil?

Vegetable oil is a neutral, refined blend used for frying, baking, and mayonnaise when flavorless fat is desired. One US cup weighs approximately 218 grams—similar to canola and sunflower oils. The slight difference from olive oil at 216 grams per cup is negligible in most home recipes but matters in large-batch commercial scaling.

Pour vegetable oil into a transparent liquid measuring cup placed on a flat counter, reading the meniscus at eye level. Weighing 218 grams per cup is faster when making multiple cakes or large marinades. Non-stick sprays are not equivalent—sprays contain propellants and use far less oil per second of spray.

Common errors include substituting butter for oil by equal weight without noting butter contains water—cakes may be dry. Reusing frying oil too many times lowers smoke point and adds off flavors not reflected in weight conversions. Measuring hot oil expands volume slightly; measure at room temperature for standard conversions.

Store vegetable oil sealed in a cool, dark pantry up to one year opened. Refrigeration is unnecessary and may cloud some oils harmlessly. Substitute olive oil at 216 grams or melted coconut oil at 218 grams per cup with flavor and texture changes in the finished dish.

Neutral vegetable oil at 218 grams per cup appears in everything from stir-fries to boxed cake mixes where consistent fat content matters more than flavor. Canola, sunflower, and generic vegetable blends fall within a few grams of this conversion. When deep-frying, weight helps calculate oil absorption estimates though actual uptake depends on food surface area and temperature. For mayonnaise and emulsified sauces, weighing oil stream additions stabilizes the blend compared to pouring from a cup measure while whisking vigorously.

Frying oil absorption into foods does not change the starting 218 grams per cup poured into the pot, but weighing fresh oil helps track how much to replenish between batches for consistent flavor.