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Alcoholic Beverage, Distilled, All (Gin, Rum, Vodka, Whiskey) 90 Proof

90-proof distilled spirits (gin, rum, vodka, whiskey) contain 45% alcohol by volume and have a density of 0.940 g/ml, lighter than water because ethanol (0.789 g/ml) makes up nearly half the liquid. One US cup weighs approximately 222 g and one tablespoon about 13.9 g. The extra 2 percentage points of alcohol compared to 86-proof spirits do not measurably change the density at this precision, as both round to 0.94 g/ml. These higher-proof spirits are used in cooking applications where stronger alcohol concentration is desired: flambe dishes, high-proof vanilla extract, limoncello, and vodka pie crust where alcohol provides moisture without developing gluten. Weighing is important because the lower density means a cup of spirits delivers 15 g less mass than a cup of water.

What is Alcoholic Beverage, Distilled, All (Gin, Rum, Vodka, Whiskey) 90 Proof?

90-proof distilled spirits (gin, rum, vodka, whiskey) contain 45% alcohol by volume and have a density of 0.940 g/ml, lighter than water because ethanol (0.789 g/ml) makes up nearly half the liquid. One US cup weighs approximately 222 g and one tablespoon about 13.9 g. The extra 2 percentage points of alcohol compared to 86-proof spirits do not measurably change the density at this precision, as both round to 0.94 g/ml. These higher-proof spirits are used in cooking applications where stronger alcohol concentration is desired: flambe dishes, high-proof vanilla extract.

Liquids are not interchangeable with water in weight terms. Density changes with fat, sugar, and dissolved solids, so the same cup can convert above or below water-based assumptions. Use these density-based gram values when scaling sauces, drinks, and dressings.

Chef note:Chefs scale sauces by weight because density shifts quietly change flavor balance.

Alcoholic Beverage, Distilled, All (Gin, Rum, Vodka, Whiskey) 90 Proof — mL → g

Alcoholic Beverage, Distilled, All (Gin, Rum, Vodka, Whiskey) 90 Proof — Cup → g

Alcoholic Beverage, Distilled, All (Gin, Rum, Vodka, Whiskey) 90 Proof — Tbsp → g

Alcoholic Beverage, Distilled, All (Gin, Rum, Vodka, Whiskey) 90 Proof — g → Cups

Alcoholic Beverage, Distilled, All (Gin, Rum, Vodka, Whiskey) 90 Proof — Tsp → g

Alcoholic Beverage, Distilled, All (Gin, Rum, Vodka, Whiskey) 90 Proof — oz → g

Beverages

Sugary drinks and juices are significantly denser than plain water due to dissolved solids. Converting 'cups' to grams is the best way to accurately track sugar intake or mix precise cocktails and punches.

FAQ

Is there a measurable density difference between 86-proof and 90-proof spirits?

At USDA measurement precision, no. Both 86-proof (43% ABV) and 90-proof (45% ABV) spirits are recorded at 0.940 g/ml. The theoretical difference is roughly 0.002-0.003 g/ml, which falls within measurement tolerance and is irrelevant for any culinary or cocktail application. A cup of either weighs approximately 222 g.

Why do spirits weigh less per cup than water, and how does this affect cocktail recipes?

Ethanol has a density of 0.789 g/ml, about 21% lighter than water. At 45% ABV, the blended density drops to 0.940 g/ml, so a cup weighs 222 g instead of 237 g. In cocktail recipes measured by volume, this means spirits contribute less mass than an equal volume of juice or syrup. For recipes specifying ingredients by weight, 222 g of spirits equals one cup, not 237 g.

How much alcohol remains after cooking with 90-proof spirits?

Alcohol retention depends on cooking method and duration, not proof. After a flambe, roughly 75% of the alcohol remains. Simmering for 15 minutes retains about 40%, and 2.5 hours of braising leaves approximately 5%. The starting higher proof means more total alcohol enters the dish, so proportionally more remains at each stage compared to using 80-proof spirits.