What Is the Party Drink Calculator?
Running out of drinks—or being stuck with cases of leftovers—are the two most common party-planning mistakes. The Party Drink Calculator gives you a fast, realistic estimate of how many servings to buy based on the size and length of your event. It works for any gathering: birthdays, weddings, holiday parties, BBQs, and office socials.
How to Use It
Enter three numbers: the number of guests, the party duration in hours, and how many drinks you expect each guest to have per hour. A common rule of thumb is about 1 drink per guest per hour, with the first hour often running a bit higher. The calculator returns the total servings needed and a suggested breakdown across beer, wine, and cocktails.
The Formula Explained
The core calculation is simple:
$$\text{Total Drinks} = \text{Guests} \times \text{Hours} \times \text{Drinks per Hour}$$
From the total, we apply a popular planning split—50% beer, 30% wine, and 20% spirits or cocktails. Because a standard 750 ml wine bottle pours about 5 glasses, wine bottles are estimated as the wine servings divided by 5.
Worked Example
Say you're hosting 20 guests for a 4-hour party, with each guest having roughly 1 drink per hour: $$20 \times 4 \times 1 = 80 \text{ total drinks}.$$ That's about 40 beers, 24 wine servings (\(\approx 5\) bottles), and 16 cocktail servings.
FAQ
How many drinks per hour should I assume? One per guest per hour is a safe baseline. Use 1.5 for a heavy-drinking crowd or 0.5 for a daytime or family event.
Should I round up? Yes—always round up to whole packs and bottles so you don't fall short. It's better to have a small surplus.
Does this include non-alcoholic options? Plan for some guests to choose water, soda, or mocktails. Reduce the drinks-per-hour figure if many guests won't be drinking alcohol.
