How Much Alcohol Do I Need To Buy For My Wedding. A general rule for wedding receptions is to have the alcohol you purchase consist of a ratio of 50% wine, 30% beer, and 20% liquor. In order to figure out how much to buy, you can use this handy alcohol calculator.
And of course a bottle of beer is one serving. Luckily, most people tend to stick to whatever liquor is provided, so there is no need to buy as much of these additional ones as you buy of the main drinks. The amount of alcohol to buy for your wedding will greatly depend on the time of day your reception will be held, the amount of people at your reception, the type of alcohol they are likely to drink, and whether your guests are heavy or light drinkers.
Based on the above, you will have 420 servings of wine, 180 servings of hard liquor and 240 servings of beer.
Let’s take an example of 100 guests for an alcohol calculator wedding. Some will drink less, obviously—but some may drink more. Here are our wedding alcohol tips: Discussion from the chowhound spirits, wedding food community.