Alcohol Evaporation Calculator
Estimate how much alcohol remains in a dish after cooking by entering the initial alcohol content and cooking time. Useful for recipe planning when cooking for children, pregnant guests, or those avoiding alcohol.
About this calculator
When alcohol is added to a hot dish, it evaporates over time, but not instantaneously — a common culinary misconception. This calculator models evaporation using an exponential decay formula: remainingAlcohol = initialAlcohol × 0.5^(cookingTime / 60). This means the alcohol content halves approximately every 60 minutes of cooking. The model assumes continuous simmering; flambéing or brief flaming removes far less alcohol than most people expect. Research by the USDA shows that even after 2.5 hours of cooking, roughly 5% of the original alcohol can remain. Cooking method also plays a role: uncovered pans and longer simmer times accelerate evaporation, while covered pots or baked dishes retain more alcohol.
How to use
You are making a wine sauce starting with 14% alcohol (a typical table wine) and you simmer it uncovered for 30 minutes. Enter 14 in the Initial Alcohol Content field and 30 in the Cooking Time field. The formula gives: remainingAlcohol = 14 × 0.5^(30 / 60) = 14 × 0.5^0.5 = 14 × 0.7071 ≈ 9.9%. After 30 minutes of simmering, approximately 9.9% alcohol remains. Extend cooking to 60 minutes and the result becomes: 14 × 0.5^1 = 7%, meaning half the alcohol is gone after one full hour of cooking.
Frequently asked questions
How long do you need to cook wine or beer to remove most of the alcohol?
According to USDA research, cooking times must be surprisingly long to remove most alcohol. After 15 minutes of simmering, about 40% of the alcohol remains; after 30 minutes, roughly 35%; and after 1 hour, around 25% may still be present. To reduce alcohol below 5% of its original level, you generally need more than 2 hours of uncovered simmering. Simply bringing a dish to a boil does not remove a significant amount — continuous evaporation over time is what drives the reduction.
Is food cooked with alcohol safe for children or pregnant women?
This is a topic where caution is warranted. Even after prolonged cooking, measurable amounts of alcohol can remain in a dish — sometimes 5–10% of the original content after two hours. For children and pregnant women, any alcohol intake is generally advised against by health authorities. Dishes flambéed briefly or baked in covered pots retain significantly more alcohol than dishes simmered uncovered for long periods. If serving high-risk individuals, it is safest to substitute non-alcoholic alternatives such as grape juice, apple cider, or broth.
Does the cooking method affect how quickly alcohol evaporates from food?
Yes, cooking method has a significant impact on alcohol retention. Uncovered pans with a large surface area allow steam — and alcohol vapor — to escape freely, accelerating evaporation. Covered pots trap vapor and dramatically slow alcohol loss; some studies show covered dishes retain up to 85% of their alcohol even after prolonged cooking. Flambéing, despite its dramatic visual effect, only burns off the alcohol on the surface for a brief period and may remove as little as 25% of the total alcohol content. Stirring frequently and using wide, shallow pans maximizes evaporation efficiency.